From: Eryu Guan <eg...@linux.alibaba.com>
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 <eg...@linux.alibaba.com>
Reviewed-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
dgilbert: Reworked for libfuse's log_func
Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
---
contrib/virtiofsd/fuse_log.c | 4 ++
contrib/virtiofsd/fuse_lowlevel.c | 79 ++++++++++-------------
contrib/virtiofsd/fuse_lowlevel.h | 1 +
contrib/virtiofsd/helper.c | 9 ++-
contrib/virtiofsd/passthrough_ll.c | 100 +++++++++++++----------------
5 files changed, 91 insertions(+), 102 deletions(-)
diff --git a/contrib/virtiofsd/fuse_log.c b/contrib/virtiofsd/fuse_log.c
index 0d268ab014..b11f6d0c08 100644
--- a/contrib/virtiofsd/fuse_log.c
+++ b/contrib/virtiofsd/fuse_log.c
@@ -8,6 +8,10 @@
See the file COPYING.LIB
*/
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <syslog.h>
#include "fuse_log.h"
#include <stdarg.h>
diff --git a/contrib/virtiofsd/fuse_lowlevel.c
b/contrib/virtiofsd/fuse_lowlevel.c
index 8f9a59a34c..20f2190194 100644
--- a/contrib/virtiofsd/fuse_lowlevel.c
+++ b/contrib/virtiofsd/fuse_lowlevel.c
@@ -155,20 +155,17 @@ 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)) {
@@ -1663,9 +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;
@@ -1878,13 +1874,11 @@ 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;
@@ -2070,19 +2064,17 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid,
if (se->conn.proto_minor >= 23)
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);
if (arg->minor < 5)
outargsize = FUSE_COMPAT_INIT_OUT_SIZE;
else if (arg->minor < 23)
@@ -2370,13 +2362,12 @@ 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/contrib/virtiofsd/fuse_lowlevel.h
b/contrib/virtiofsd/fuse_lowlevel.h
index 112596caaf..49cf5b22ff 100644
--- a/contrib/virtiofsd/fuse_lowlevel.h
+++ b/contrib/virtiofsd/fuse_lowlevel.h
@@ -1799,6 +1799,7 @@ struct fuse_cmdline_opts {
int print_capabilities;
int clone_fd;
int syslog;
+ int log_level;
unsigned int max_idle_threads;
};
diff --git a/contrib/virtiofsd/helper.c b/contrib/virtiofsd/helper.c
index b1e45aee05..d9eb9ff62c 100644
--- a/contrib/virtiofsd/helper.c
+++ b/contrib/virtiofsd/helper.c
@@ -29,7 +29,6 @@
#define FUSE_HELPER_OPT_VALUE(t, p, v) \
{ 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),
@@ -54,6 +53,10 @@ static const struct fuse_opt fuse_helper_opts[] = {
FUSE_HELPER_OPT("clone_fd", clone_fd),
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
};
@@ -143,7 +146,9 @@ void fuse_cmdline_help(void)
" -o clone_fd use separate fuse device fd for
each thread\n"
" (may improve performance)\n"
" -o max_idle_threads the maximum number of idle
worker threads\n"
- " allowed (default: 10)\n");
+ " allowed (default: 10)\n"
+ " -o log_level=<level> log level, default to \"info\"\n"
+ " level could be one of \"debug,
info, warn, err\"\n");
}
static int fuse_helper_opt_proc(void *data, const char *arg, int key,
diff --git a/contrib/virtiofsd/passthrough_ll.c
b/contrib/virtiofsd/passthrough_ll.c
index b413687720..8ad41b1072 100644
--- a/contrib/virtiofsd/passthrough_ll.c
+++ b/contrib/virtiofsd/passthrough_ll.c
@@ -36,6 +36,7 @@
#include "fuse_virtio.h"
#include "fuse_lowlevel.h"
+#include "fuse_log.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
@@ -153,6 +154,7 @@ 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);
@@ -446,11 +448,6 @@ 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)
{
@@ -461,13 +458,11 @@ static void lo_init(void *userdata,
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;
}
}
@@ -789,9 +784,9 @@ 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;
@@ -807,9 +802,7 @@ 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
* support.
@@ -911,9 +904,9 @@ static void lo_mknod_symlink(fuse_req_t req, fuse_ino_t
parent,
if (saverr)
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;
@@ -1010,10 +1003,9 @@ 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;
@@ -1107,12 +1099,10 @@ static void lo_forget_one(fuse_req_t req, fuse_ino_t
ino, uint64_t nlookup)
if (!inode)
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);
}
@@ -1364,9 +1354,7 @@ 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);
@@ -1439,9 +1427,7 @@ 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
when userspace opened write-only */
@@ -1543,9 +1529,8 @@ static void lo_read(fuse_req_t req, fuse_ino_t ino,
size_t size,
{
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);
@@ -1567,9 +1552,8 @@ 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
@@ -1662,10 +1646,8 @@ static void lo_getxattr(fuse_req_t req, fuse_ino_t ino,
const char *name,
if (!lo_data(req)->xattr)
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. */
@@ -1734,10 +1716,7 @@ static void lo_listxattr(fuse_req_t req, fuse_ino_t ino,
size_t size)
if (!lo_data(req)->xattr)
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. */
@@ -1806,10 +1785,9 @@ static void lo_setxattr(fuse_req_t req, fuse_ino_t ino,
const char *name,
if (!lo_data(req)->xattr)
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 removexattr on symlink. */
@@ -1853,10 +1831,8 @@ static void lo_removexattr(fuse_req_t req, fuse_ino_t
ino, const char *name)
if (!lo_data(req)->xattr)
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. */
@@ -2147,6 +2123,9 @@ 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) {
@@ -2227,8 +2206,17 @@ int main(int argc, char *argv[])
if (fuse_opt_parse(&args, &lo, lo_opts, NULL)== -1)
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;
--
2.23.0
