From: Eryu Guan <eguan@linux.alibaba.com>
Date: Mon, 27 Jan 2020 19:01:37 +0000
Subject: [PATCH] virtiofsd: print log only when priority is high enough
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Introduce "-o log_level=" command line option to specify current log
level (priority), valid values are "debug info warn err", e.g.
./virtiofsd -o log_level=debug ...
So only log priority higher than "debug" will be printed to
stderr/syslog. And the default level is info.
The "-o debug"/"-d" options are kept, and imply debug log level.
Signed-off-by: Eryu Guan <eguan@linux.alibaba.com>
dgilbert: Reworked for libfuse's log_func
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
with fix by:
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit d240314a1a18a1d914af1b5763fe8c9a572e6409)
---
tools/virtiofsd/fuse_lowlevel.c | 75 ++++++++------------
tools/virtiofsd/fuse_lowlevel.h | 1 +
tools/virtiofsd/helper.c | 8 ++-
tools/virtiofsd/passthrough_ll.c | 118 +++++++++++++------------------
4 files changed, 87 insertions(+), 115 deletions(-)
diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
index 6ceb33d913..a7a19685b5 100644
--- a/tools/virtiofsd/fuse_lowlevel.c
+++ b/tools/virtiofsd/fuse_lowlevel.c
@@ -158,19 +158,17 @@ static int fuse_send_msg(struct fuse_session *se, struct fuse_chan *ch,
struct fuse_out_header *out = iov[0].iov_base;
out->len = iov_length(iov, count);
- if (se->debug) {
- if (out->unique == 0) {
- fuse_log(FUSE_LOG_DEBUG, "NOTIFY: code=%d length=%u\n", out->error,
- out->len);
- } else if (out->error) {
- fuse_log(FUSE_LOG_DEBUG,
- " unique: %llu, error: %i (%s), outsize: %i\n",
- (unsigned long long)out->unique, out->error,
- strerror(-out->error), out->len);
- } else {
- fuse_log(FUSE_LOG_DEBUG, " unique: %llu, success, outsize: %i\n",
- (unsigned long long)out->unique, out->len);
- }
+ if (out->unique == 0) {
+ fuse_log(FUSE_LOG_DEBUG, "NOTIFY: code=%d length=%u\n", out->error,
+ out->len);
+ } else if (out->error) {
+ fuse_log(FUSE_LOG_DEBUG,
+ " unique: %llu, error: %i (%s), outsize: %i\n",
+ (unsigned long long)out->unique, out->error,
+ strerror(-out->error), out->len);
+ } else {
+ fuse_log(FUSE_LOG_DEBUG, " unique: %llu, success, outsize: %i\n",
+ (unsigned long long)out->unique, out->len);
}
if (fuse_lowlevel_is_virtio(se)) {
@@ -1662,10 +1660,8 @@ static void do_interrupt(fuse_req_t req, fuse_ino_t nodeid,
return;
}
- if (se->debug) {
- fuse_log(FUSE_LOG_DEBUG, "INTERRUPT: %llu\n",
- (unsigned long long)arg->unique);
- }
+ fuse_log(FUSE_LOG_DEBUG, "INTERRUPT: %llu\n",
+ (unsigned long long)arg->unique);
req->u.i.unique = arg->unique;
@@ -1901,13 +1897,10 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
}
}
- if (se->debug) {
- fuse_log(FUSE_LOG_DEBUG, "INIT: %u.%u\n", arg->major, arg->minor);
- if (arg->major == 7 && arg->minor >= 6) {
- fuse_log(FUSE_LOG_DEBUG, "flags=0x%08x\n", arg->flags);
- fuse_log(FUSE_LOG_DEBUG, "max_readahead=0x%08x\n",
- arg->max_readahead);
- }
+ fuse_log(FUSE_LOG_DEBUG, "INIT: %u.%u\n", arg->major, arg->minor);
+ if (arg->major == 7 && arg->minor >= 6) {
+ fuse_log(FUSE_LOG_DEBUG, "flags=0x%08x\n", arg->flags);
+ fuse_log(FUSE_LOG_DEBUG, "max_readahead=0x%08x\n", arg->max_readahead);
}
se->conn.proto_major = arg->major;
se->conn.proto_minor = arg->minor;
@@ -2116,19 +2109,14 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
outarg.congestion_threshold = se->conn.congestion_threshold;
outarg.time_gran = se->conn.time_gran;
- if (se->debug) {
- fuse_log(FUSE_LOG_DEBUG, " INIT: %u.%u\n", outarg.major,
- outarg.minor);
- fuse_log(FUSE_LOG_DEBUG, " flags=0x%08x\n", outarg.flags);
- fuse_log(FUSE_LOG_DEBUG, " max_readahead=0x%08x\n",
- outarg.max_readahead);
- fuse_log(FUSE_LOG_DEBUG, " max_write=0x%08x\n", outarg.max_write);
- fuse_log(FUSE_LOG_DEBUG, " max_background=%i\n",
- outarg.max_background);
- fuse_log(FUSE_LOG_DEBUG, " congestion_threshold=%i\n",
- outarg.congestion_threshold);
- fuse_log(FUSE_LOG_DEBUG, " time_gran=%u\n", outarg.time_gran);
- }
+ fuse_log(FUSE_LOG_DEBUG, " INIT: %u.%u\n", outarg.major, outarg.minor);
+ fuse_log(FUSE_LOG_DEBUG, " flags=0x%08x\n", outarg.flags);
+ fuse_log(FUSE_LOG_DEBUG, " max_readahead=0x%08x\n", outarg.max_readahead);
+ fuse_log(FUSE_LOG_DEBUG, " max_write=0x%08x\n", outarg.max_write);
+ fuse_log(FUSE_LOG_DEBUG, " max_background=%i\n", outarg.max_background);
+ fuse_log(FUSE_LOG_DEBUG, " congestion_threshold=%i\n",
+ outarg.congestion_threshold);
+ fuse_log(FUSE_LOG_DEBUG, " time_gran=%u\n", outarg.time_gran);
send_reply_ok(req, &outarg, outargsize);
}
@@ -2407,14 +2395,11 @@ void fuse_session_process_buf_int(struct fuse_session *se,
in = fuse_mbuf_iter_advance(&iter, sizeof(*in));
assert(in); /* caller guarantees the input buffer is large enough */
- if (se->debug) {
- fuse_log(FUSE_LOG_DEBUG,
- "unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, "
- "pid: %u\n",
- (unsigned long long)in->unique,
- opname((enum fuse_opcode)in->opcode), in->opcode,
- (unsigned long long)in->nodeid, buf->size, in->pid);
- }
+ fuse_log(
+ FUSE_LOG_DEBUG,
+ "unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, pid: %u\n",
+ (unsigned long long)in->unique, opname((enum fuse_opcode)in->opcode),
+ in->opcode, (unsigned long long)in->nodeid, buf->size, in->pid);
req = fuse_ll_alloc_req(se);
if (req == NULL) {
diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h
index f2750bc189..138041e5f1 100644
--- a/tools/virtiofsd/fuse_lowlevel.h
+++ b/tools/virtiofsd/fuse_lowlevel.h
@@ -1796,6 +1796,7 @@ struct fuse_cmdline_opts {
int show_help;
int print_capabilities;
int syslog;
+ int log_level;
unsigned int max_idle_threads;
};
diff --git a/tools/virtiofsd/helper.c b/tools/virtiofsd/helper.c
index 9692ef9f1f..6d50a46a7e 100644
--- a/tools/virtiofsd/helper.c
+++ b/tools/virtiofsd/helper.c
@@ -34,7 +34,6 @@
t, offsetof(struct fuse_cmdline_opts, p), v \
}
-
static const struct fuse_opt fuse_helper_opts[] = {
FUSE_HELPER_OPT("-h", show_help),
FUSE_HELPER_OPT("--help", show_help),
@@ -55,6 +54,10 @@ static const struct fuse_opt fuse_helper_opts[] = {
FUSE_OPT_KEY("subtype=", FUSE_OPT_KEY_KEEP),
FUSE_HELPER_OPT("max_idle_threads=%u", max_idle_threads),
FUSE_HELPER_OPT("--syslog", syslog),
+ FUSE_HELPER_OPT_VALUE("log_level=debug", log_level, FUSE_LOG_DEBUG),
+ FUSE_HELPER_OPT_VALUE("log_level=info", log_level, FUSE_LOG_INFO),
+ FUSE_HELPER_OPT_VALUE("log_level=warn", log_level, FUSE_LOG_WARNING),
+ FUSE_HELPER_OPT_VALUE("log_level=err", log_level, FUSE_LOG_ERR),
FUSE_OPT_END
};
@@ -142,6 +145,9 @@ void fuse_cmdline_help(void)
" --syslog log to syslog (default stderr)\n"
" -f foreground operation\n"
" --daemonize run in background\n"
+ " -o log_level=<level> log level, default to \"info\"\n"
+ " level could be one of \"debug, "
+ "info, warn, err\"\n"
" -o max_idle_threads the maximum number of idle worker "
"threads\n"
" allowed (default: 10)\n"
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index 0372aca143..ff6910fd73 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -37,6 +37,7 @@
#include "qemu/osdep.h"
#include "fuse_virtio.h"
+#include "fuse_log.h"
#include "fuse_lowlevel.h"
#include <assert.h>
#include <cap-ng.h>
@@ -140,6 +141,7 @@ static const struct fuse_opt lo_opts[] = {
FUSE_OPT_END
};
static bool use_syslog = false;
+static int current_log_level;
static void unref_inode(struct lo_data *lo, struct lo_inode *inode, uint64_t n);
@@ -458,11 +460,6 @@ static int lo_fd(fuse_req_t req, fuse_ino_t ino)
return inode ? inode->fd : -1;
}
-static bool lo_debug(fuse_req_t req)
-{
- return lo_data(req)->debug != 0;
-}
-
static void lo_init(void *userdata, struct fuse_conn_info *conn)
{
struct lo_data *lo = (struct lo_data *)userdata;
@@ -472,15 +469,11 @@ static void lo_init(void *userdata, struct fuse_conn_info *conn)
}
if (lo->writeback && conn->capable & FUSE_CAP_WRITEBACK_CACHE) {
- if (lo->debug) {
- fuse_log(FUSE_LOG_DEBUG, "lo_init: activating writeback\n");
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_init: activating writeback\n");
conn->want |= FUSE_CAP_WRITEBACK_CACHE;
}
if (lo->flock && conn->capable & FUSE_CAP_FLOCK_LOCKS) {
- if (lo->debug) {
- fuse_log(FUSE_LOG_DEBUG, "lo_init: activating flock locks\n");
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_init: activating flock locks\n");
conn->want |= FUSE_CAP_FLOCK_LOCKS;
}
}
@@ -823,10 +816,8 @@ static int lo_do_lookup(fuse_req_t req, fuse_ino_t parent, const char *name,
}
e->ino = inode->fuse_ino;
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, " %lli/%s -> %lli\n",
- (unsigned long long)parent, name, (unsigned long long)e->ino);
- }
+ fuse_log(FUSE_LOG_DEBUG, " %lli/%s -> %lli\n", (unsigned long long)parent,
+ name, (unsigned long long)e->ino);
return 0;
@@ -843,10 +834,8 @@ static void lo_lookup(fuse_req_t req, fuse_ino_t parent, const char *name)
struct fuse_entry_param e;
int err;
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, "lo_lookup(parent=%" PRIu64 ", name=%s)\n",
- parent, name);
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_lookup(parent=%" PRIu64 ", name=%s)\n", parent,
+ name);
/*
* Don't use is_safe_path_component(), allow "." and ".." for NFS export
@@ -971,10 +960,8 @@ static void lo_mknod_symlink(fuse_req_t req, fuse_ino_t parent,
goto out;
}
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, " %lli/%s -> %lli\n",
- (unsigned long long)parent, name, (unsigned long long)e.ino);
- }
+ fuse_log(FUSE_LOG_DEBUG, " %lli/%s -> %lli\n", (unsigned long long)parent,
+ name, (unsigned long long)e.ino);
fuse_reply_entry(req, &e);
return;
@@ -1074,10 +1061,8 @@ static void lo_link(fuse_req_t req, fuse_ino_t ino, fuse_ino_t parent,
pthread_mutex_unlock(&lo->mutex);
e.ino = inode->fuse_ino;
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, " %lli/%s -> %lli\n",
- (unsigned long long)parent, name, (unsigned long long)e.ino);
- }
+ fuse_log(FUSE_LOG_DEBUG, " %lli/%s -> %lli\n", (unsigned long long)parent,
+ name, (unsigned long long)e.ino);
fuse_reply_entry(req, &e);
return;
@@ -1171,11 +1156,9 @@ static void lo_forget_one(fuse_req_t req, fuse_ino_t ino, uint64_t nlookup)
return;
}
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, " forget %lli %lli -%lli\n",
- (unsigned long long)ino, (unsigned long long)inode->refcount,
- (unsigned long long)nlookup);
- }
+ fuse_log(FUSE_LOG_DEBUG, " forget %lli %lli -%lli\n",
+ (unsigned long long)ino, (unsigned long long)inode->refcount,
+ (unsigned long long)nlookup);
unref_inode(lo, inode, nlookup);
}
@@ -1445,10 +1428,8 @@ static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name,
int err;
struct lo_cred old = {};
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, "lo_create(parent=%" PRIu64 ", name=%s)\n",
- parent, name);
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_create(parent=%" PRIu64 ", name=%s)\n", parent,
+ name);
if (!is_safe_path_component(name)) {
fuse_reply_err(req, EINVAL);
@@ -1525,10 +1506,8 @@ static void lo_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
char buf[64];
struct lo_data *lo = lo_data(req);
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, "lo_open(ino=%" PRIu64 ", flags=%d)\n", ino,
- fi->flags);
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_open(ino=%" PRIu64 ", flags=%d)\n", ino,
+ fi->flags);
/*
* With writeback cache, kernel may send read requests even
@@ -1644,12 +1623,10 @@ static void lo_read(fuse_req_t req, fuse_ino_t ino, size_t size, off_t offset,
{
struct fuse_bufvec buf = FUSE_BUFVEC_INIT(size);
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG,
- "lo_read(ino=%" PRIu64 ", size=%zd, "
- "off=%lu)\n",
- ino, size, (unsigned long)offset);
- }
+ fuse_log(FUSE_LOG_DEBUG,
+ "lo_read(ino=%" PRIu64 ", size=%zd, "
+ "off=%lu)\n",
+ ino, size, (unsigned long)offset);
buf.buf[0].flags = FUSE_BUF_IS_FD | FUSE_BUF_FD_SEEK;
buf.buf[0].fd = lo_fi_fd(req, fi);
@@ -1671,11 +1648,9 @@ static void lo_write_buf(fuse_req_t req, fuse_ino_t ino,
out_buf.buf[0].fd = lo_fi_fd(req, fi);
out_buf.buf[0].pos = off;
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG,
- "lo_write(ino=%" PRIu64 ", size=%zd, off=%lu)\n", ino,
- out_buf.buf[0].size, (unsigned long)off);
- }
+ fuse_log(FUSE_LOG_DEBUG,
+ "lo_write_buf(ino=%" PRIu64 ", size=%zd, off=%lu)\n", ino,
+ out_buf.buf[0].size, (unsigned long)off);
/*
* If kill_priv is set, drop CAP_FSETID which should lead to kernel
@@ -1774,11 +1749,8 @@ static void lo_getxattr(fuse_req_t req, fuse_ino_t ino, const char *name,
goto out;
}
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG,
- "lo_getxattr(ino=%" PRIu64 ", name=%s size=%zd)\n", ino, name,
- size);
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_getxattr(ino=%" PRIu64 ", name=%s size=%zd)\n",
+ ino, name, size);
if (inode->is_symlink) {
/* Sorry, no race free way to getxattr on symlink. */
@@ -1852,10 +1824,8 @@ static void lo_listxattr(fuse_req_t req, fuse_ino_t ino, size_t size)
goto out;
}
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, "lo_listxattr(ino=%" PRIu64 ", size=%zd)\n",
- ino, size);
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_listxattr(ino=%" PRIu64 ", size=%zd)\n", ino,
+ size);
if (inode->is_symlink) {
/* Sorry, no race free way to listxattr on symlink. */
@@ -1929,11 +1899,8 @@ static void lo_setxattr(fuse_req_t req, fuse_ino_t ino, const char *name,
goto out;
}
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG,
- "lo_setxattr(ino=%" PRIu64 ", name=%s value=%s size=%zd)\n",
- ino, name, value, size);
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_setxattr(ino=%" PRIu64
+ ", name=%s value=%s size=%zd)\n", ino, name, value, size);
if (inode->is_symlink) {
/* Sorry, no race free way to setxattr on symlink. */
@@ -1978,10 +1945,8 @@ static void lo_removexattr(fuse_req_t req, fuse_ino_t ino, const char *name)
goto out;
}
- if (lo_debug(req)) {
- fuse_log(FUSE_LOG_DEBUG, "lo_removexattr(ino=%" PRIu64 ", name=%s)\n",
- ino, name);
- }
+ fuse_log(FUSE_LOG_DEBUG, "lo_removexattr(ino=%" PRIu64 ", name=%s)\n", ino,
+ name);
if (inode->is_symlink) {
/* Sorry, no race free way to setxattr on symlink. */
@@ -2303,6 +2268,10 @@ static void setup_nofile_rlimit(void)
static void log_func(enum fuse_log_level level, const char *fmt, va_list ap)
{
+ if (current_log_level < level) {
+ return;
+ }
+
if (use_syslog) {
int priority = LOG_ERR;
switch (level) {
@@ -2401,8 +2370,19 @@ int main(int argc, char *argv[])
return 1;
}
+ /*
+ * log_level is 0 if not configured via cmd options (0 is LOG_EMERG,
+ * and we don't use this log level).
+ */
+ if (opts.log_level != 0) {
+ current_log_level = opts.log_level;
+ }
lo.debug = opts.debug;
+ if (lo.debug) {
+ current_log_level = FUSE_LOG_DEBUG;
+ }
lo.root.refcount = 2;
+
if (lo.source) {
struct stat stat;
int res;