[PATCH 1/2] netfs: Revert "netfs: Switch debug logging to pr_debug()"

David Howells
2024-07-18T20:07:40Z

Revert commit 163eae0fb0d4c610c59a8de38040f8e12f89fd43 to get back the
original operation of the debugging macros.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Uwe Kleine-König <ukleinek@kernel.org>
cc: Christian Brauner <brauner@kernel.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/20240608151352.22860-2-ukleinek@kernel.org
---
fs/netfs/buffered_read.c | 14 +++++++-------
fs/netfs/buffered_write.c | 12 ++++++------
fs/netfs/direct_read.c | 2 +-
fs/netfs/direct_write.c | 8 ++++----
fs/netfs/fscache_cache.c | 4 ++--
fs/netfs/fscache_cookie.c | 28 ++++++++++++++--------------
fs/netfs/fscache_io.c | 12 ++++++------
fs/netfs/fscache_main.c | 2 +-
fs/netfs/fscache_volume.c | 4 ++--
fs/netfs/internal.h | 33 ++++++++++++++++++++++++++++++++-
fs/netfs/io.c | 12 ++++++------
fs/netfs/main.c | 4 ++++
fs/netfs/misc.c | 4 ++--
fs/netfs/write_collect.c | 16 ++++++++--------
fs/netfs/write_issue.c | 36 ++++++++++++++++++------------------
15 files changed, 113 insertions(+), 78 deletions(-)

diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c
index 4c0401dbbfcf..a6bb03bea920 100644
--- a/fs/netfs/buffered_read.c
+++ b/fs/netfs/buffered_read.c
@@ -117,7 +117,7 @@ void netfs_rreq_unlock_folios(struct netfs_io_request *rreq)
if (!test_bit(NETFS_RREQ_DONT_UNLOCK_FOLIOS, &rreq->flags)) {
if (folio->index == rreq->no_unlock_folio &&
test_bit(NETFS_RREQ_NO_UNLOCK_FOLIO, &rreq->flags))
- kdebug("no unlock");
+ _debug("no unlock");
else
folio_unlock(folio);
}
@@ -204,7 +204,7 @@ void netfs_readahead(struct readahead_control *ractl)
struct netfs_inode *ctx = netfs_inode(ractl->mapping->host);
int ret;

- kenter("%lx,%x", readahead_index(ractl), readahead_count(ractl));
+ _enter("%lx,%x", readahead_index(ractl), readahead_count(ractl));

if (readahead_count(ractl) == 0)
return;
@@ -268,7 +268,7 @@ int netfs_read_folio(struct file *file, struct folio *folio)
struct folio *sink = NULL;
int ret;

- kenter("%lx", folio->index);
+ _enter("%lx", folio->index);

rreq = netfs_alloc_request(mapping, file,
folio_file_pos(folio), folio_size(folio),
@@ -508,7 +508,7 @@ int netfs_write_begin(struct netfs_inode *ctx,

have_folio:
*_folio = folio;
- kleave(" = 0");
+ _leave(" = 0");
return 0;

error_put:
@@ -518,7 +518,7 @@ int netfs_write_begin(struct netfs_inode *ctx,
folio_unlock(folio);
folio_put(folio);
}
- kleave(" = %d", ret);
+ _leave(" = %d", ret);
return ret;
}
EXPORT_SYMBOL(netfs_write_begin);
@@ -536,7 +536,7 @@ int netfs_prefetch_for_write(struct file *file, struct folio *folio,
size_t flen = folio_size(folio);
int ret;

- kenter("%zx @%llx", flen, start);
+ _enter("%zx @%llx", flen, start);

ret = -ENOMEM;

@@ -567,7 +567,7 @@ int netfs_prefetch_for_write(struct file *file, struct folio *folio,
error_put:
netfs_put_request(rreq, false, netfs_rreq_trace_put_discard);
error:
- kleave(" = %d", ret);
+ _leave(" = %d", ret);
return ret;
}

diff --git a/fs/netfs/buffered_write.c b/fs/netfs/buffered_write.c
index ecbc99ec7d36..d583af7a2209 100644
--- a/fs/netfs/buffered_write.c
+++ b/fs/netfs/buffered_write.c
@@ -56,7 +56,7 @@ static enum netfs_how_to_modify netfs_how_to_modify(struct netfs_inode *ctx,
struct netfs_group *group = netfs_folio_group(folio);
loff_t pos = folio_file_pos(folio);

- kenter("");
+ _enter("");

if (group != netfs_group && group != NETFS_FOLIO_COPY_TO_CACHE)
return NETFS_FLUSH_CONTENT;
@@ -272,12 +272,12 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
*/
howto = netfs_how_to_modify(ctx, file, folio, netfs_group,
flen, offset, part, maybe_trouble);
- kdebug("howto %u", howto);
+ _debug("howto %u", howto);
switch (howto) {
case NETFS_JUST_PREFETCH:
ret = netfs_prefetch_for_write(file, folio, offset, part);
if (ret < 0) {
- kdebug("prefetch = %zd", ret);
+ _debug("prefetch = %zd", ret);
goto error_folio_unlock;
}
break;
@@ -418,7 +418,7 @@ ssize_t netfs_perform_write(struct kiocb *iocb, struct iov_iter *iter,
}

iocb->ki_pos += written;
- kleave(" = %zd [%zd]", written, ret);
+ _leave(" = %zd [%zd]", written, ret);
return written ? written : ret;

error_folio_unlock:
@@ -491,7 +491,7 @@ ssize_t netfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
struct netfs_inode *ictx = netfs_inode(inode);
ssize_t ret;

- kenter("%llx,%zx,%llx", iocb->ki_pos, iov_iter_count(from), i_size_read(inode));
+ _enter("%llx,%zx,%llx", iocb->ki_pos, iov_iter_count(from), i_size_read(inode));

if (!iov_iter_count(from))
return 0;
@@ -529,7 +529,7 @@ vm_fault_t netfs_page_mkwrite(struct vm_fault *vmf, struct netfs_group *netfs_gr
vm_fault_t ret = VM_FAULT_RETRY;
int err;

- kenter("%lx", folio->index);
+ _enter("%lx", folio->index);

sb_start_pagefault(inode->i_sb);

diff --git a/fs/netfs/direct_read.c b/fs/netfs/direct_read.c
index b6debac6205f..10a1e4da6bda 100644
--- a/fs/netfs/direct_read.c
+++ b/fs/netfs/direct_read.c
@@ -33,7 +33,7 @@ ssize_t netfs_unbuffered_read_iter_locked(struct kiocb *iocb, struct iov_iter *i
size_t orig_count = iov_iter_count(iter);
bool async = !is_sync_kiocb(iocb);

- kenter("");
+ _enter("");

if (!orig_count)
return 0; /* Don't update atime */
diff --git a/fs/netfs/direct_write.c b/fs/netfs/direct_write.c
index 792ef17bae21..88f2adfab75e 100644
--- a/fs/netfs/direct_write.c
+++ b/fs/netfs/direct_write.c
@@ -37,7 +37,7 @@ ssize_t netfs_unbuffered_write_iter_locked(struct kiocb *iocb, struct iov_iter *
size_t len = iov_iter_count(iter);
bool async = !is_sync_kiocb(iocb);

- kenter("");
+ _enter("");

/* We're going to need a bounce buffer if what we transmit is going to
* be different in some way to the source buffer, e.g. because it gets
@@ -45,7 +45,7 @@ ssize_t netfs_unbuffered_write_iter_locked(struct kiocb *iocb, struct iov_iter *
*/
// TODO

- kdebug("uw %llx-%llx", start, end);
+ _debug("uw %llx-%llx", start, end);

wreq = netfs_create_write_req(iocb->ki_filp->f_mapping, iocb->ki_filp, start,
iocb->ki_flags & IOCB_DIRECT ?
@@ -96,7 +96,7 @@ ssize_t netfs_unbuffered_write_iter_locked(struct kiocb *iocb, struct iov_iter *
wreq->cleanup = netfs_cleanup_dio_write;
ret = netfs_unbuffered_write(wreq, is_sync_kiocb(iocb), wreq->len);
if (ret < 0) {
- kdebug("begin = %zd", ret);
+ _debug("begin = %zd", ret);
goto out;
}

@@ -143,7 +143,7 @@ ssize_t netfs_unbuffered_write_iter(struct kiocb *iocb, struct iov_iter *from)
loff_t pos = iocb->ki_pos;
unsigned long long end = pos + iov_iter_count(from) - 1;

- kenter("%llx,%zx,%llx", pos, iov_iter_count(from), i_size_read(inode));
+ _enter("%llx,%zx,%llx", pos, iov_iter_count(from), i_size_read(inode));

if (!iov_iter_count(from))
return 0;
diff --git a/fs/netfs/fscache_cache.c b/fs/netfs/fscache_cache.c
index 288a73c3072d..9397ed39b0b4 100644
--- a/fs/netfs/fscache_cache.c
+++ b/fs/netfs/fscache_cache.c
@@ -237,7 +237,7 @@ int fscache_add_cache(struct fscache_cache *cache,
{
int n_accesses;

- kenter("{%s,%s}", ops->name, cache->name);
+ _enter("{%s,%s}", ops->name, cache->name);

BUG_ON(fscache_cache_state(cache) != FSCACHE_CACHE_IS_PREPARING);

@@ -257,7 +257,7 @@ int fscache_add_cache(struct fscache_cache *cache,

up_write(&fscache_addremove_sem);
pr_notice("Cache \"%s\" added (type %s)\n", cache->name, ops->name);
- kleave(" = 0 [%s]", cache->name);
+ _leave(" = 0 [%s]", cache->name);
return 0;
}
EXPORT_SYMBOL(fscache_add_cache);
diff --git a/fs/netfs/fscache_cookie.c b/fs/netfs/fscache_cookie.c
index 4d1e8bf4c615..bce2492186d0 100644
--- a/fs/netfs/fscache_cookie.c
+++ b/fs/netfs/fscache_cookie.c
@@ -456,7 +456,7 @@ struct fscache_cookie *__fscache_acquire_cookie(
{
struct fscache_cookie *cookie;

- kenter("V=%x", volume->debug_id);
+ _enter("V=%x", volume->debug_id);

if (!index_key || !index_key_len || index_key_len > 255 || aux_data_len > 255)
return NULL;
@@ -484,7 +484,7 @@ struct fscache_cookie *__fscache_acquire_cookie(

trace_fscache_acquire(cookie);
fscache_stat(&fscache_n_acquires_ok);
- kleave(" = c=%08x", cookie->debug_id);
+ _leave(" = c=%08x", cookie->debug_id);
return cookie;
}
EXPORT_SYMBOL(__fscache_acquire_cookie);
@@ -505,7 +505,7 @@ static void fscache_perform_lookup(struct fscache_cookie *cookie)
enum fscache_access_trace trace = fscache_access_lookup_cookie_end_failed;
bool need_withdraw = false;

- kenter("");
+ _enter("");

if (!cookie->volume->cache_priv) {
fscache_create_volume(cookie->volume, true);
@@ -519,7 +519,7 @@ static void fscache_perform_lookup(struct fscache_cookie *cookie)
if (cookie->state != FSCACHE_COOKIE_STATE_FAILED)
fscache_set_cookie_state(cookie, FSCACHE_COOKIE_STATE_QUIESCENT);
need_withdraw = true;
- kleave(" [fail]");
+ _leave(" [fail]");
goto out;
}

@@ -572,7 +572,7 @@ void __fscache_use_cookie(struct fscache_cookie *cookie, bool will_modify)
bool queue = false;
int n_active;

- kenter("c=%08x", cookie->debug_id);
+ _enter("c=%08x", cookie->debug_id);

if (WARN(test_bit(FSCACHE_COOKIE_RELINQUISHED, &cookie->flags),
"Trying to use relinquished cookie\n"))
@@ -636,7 +636,7 @@ void __fscache_use_cookie(struct fscache_cookie *cookie, bool will_modify)
spin_unlock(&cookie->lock);
if (queue)
fscache_queue_cookie(cookie, fscache_cookie_get_use_work);
- kleave("");
+ _leave("");
}
EXPORT_SYMBOL(__fscache_use_cookie);

@@ -702,7 +702,7 @@ static void fscache_cookie_state_machine(struct fscache_cookie *cookie)
enum fscache_cookie_state state;
bool wake = false;

- kenter("c=%x", cookie->debug_id);
+ _enter("c=%x", cookie->debug_id);

again:
spin_lock(&cookie->lock);
@@ -820,7 +820,7 @@ static void fscache_cookie_state_machine(struct fscache_cookie *cookie)
spin_unlock(&cookie->lock);
if (wake)
wake_up_cookie_state(cookie);
- kleave("");
+ _leave("");
}

static void fscache_cookie_worker(struct work_struct *work)
@@ -867,7 +867,7 @@ static void fscache_cookie_lru_do_one(struct fscache_cookie *cookie)
set_bit(FSCACHE_COOKIE_DO_LRU_DISCARD, &cookie->flags);
spin_unlock(&cookie->lock);
fscache_stat(&fscache_n_cookies_lru_expired);
- kdebug("lru c=%x", cookie->debug_id);
+ _debug("lru c=%x", cookie->debug_id);
__fscache_withdraw_cookie(cookie);
}

@@ -971,7 +971,7 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, bool retire)
if (retire)
fscache_stat(&fscache_n_relinquishes_retire);

- kenter("c=%08x{%d},%d",
+ _enter("c=%08x{%d},%d",
cookie->debug_id, atomic_read(&cookie->n_active), retire);

if (WARN(test_and_set_bit(FSCACHE_COOKIE_RELINQUISHED, &cookie->flags),
@@ -1050,7 +1050,7 @@ void __fscache_invalidate(struct fscache_cookie *cookie,
{
bool is_caching;

- kenter("c=%x", cookie->debug_id);
+ _enter("c=%x", cookie->debug_id);

fscache_stat(&fscache_n_invalidates);

@@ -1072,7 +1072,7 @@ void __fscache_invalidate(struct fscache_cookie *cookie,
case FSCACHE_COOKIE_STATE_INVALIDATING: /* is_still_valid will catch it */
default:
spin_unlock(&cookie->lock);
- kleave(" [no %u]", cookie->state);
+ _leave(" [no %u]", cookie->state);
return;

case FSCACHE_COOKIE_STATE_LOOKING_UP:
@@ -1081,7 +1081,7 @@ void __fscache_invalidate(struct fscache_cookie *cookie,
fallthrough;
case FSCACHE_COOKIE_STATE_CREATING:
spin_unlock(&cookie->lock);
- kleave(" [look %x]", cookie->inval_counter);
+ _leave(" [look %x]", cookie->inval_counter);
return;

case FSCACHE_COOKIE_STATE_ACTIVE:
@@ -1094,7 +1094,7 @@ void __fscache_invalidate(struct fscache_cookie *cookie,

if (is_caching)
fscache_queue_cookie(cookie, fscache_cookie_get_inval_work);
- kleave(" [inv]");
+ _leave(" [inv]");
return;
}
}
diff --git a/fs/netfs/fscache_io.c b/fs/netfs/fscache_io.c
index bf4eaeec44fb..38637e5c9b57 100644
--- a/fs/netfs/fscache_io.c
+++ b/fs/netfs/fscache_io.c
@@ -28,12 +28,12 @@ bool fscache_wait_for_operation(struct netfs_cache_resources *cres,

again:
if (!fscache_cache_is_live(cookie->volume->cache)) {
- kleave(" [broken]");
+ _leave(" [broken]");
return false;
}

state = fscache_cookie_state(cookie);
- kenter("c=%08x{%u},%x", cookie->debug_id, state, want_state);
+ _enter("c=%08x{%u},%x", cookie->debug_id, state, want_state);

switch (state) {
case FSCACHE_COOKIE_STATE_CREATING:
@@ -52,7 +52,7 @@ bool fscache_wait_for_operation(struct netfs_cache_resources *cres,
case FSCACHE_COOKIE_STATE_DROPPED:
case FSCACHE_COOKIE_STATE_RELINQUISHING:
default:
- kleave(" [not live]");
+ _leave(" [not live]");
return false;
}

@@ -92,7 +92,7 @@ static int fscache_begin_operation(struct netfs_cache_resources *cres,
spin_lock(&cookie->lock);

state = fscache_cookie_state(cookie);
- kenter("c=%08x{%u},%x", cookie->debug_id, state, want_state);
+ _enter("c=%08x{%u},%x", cookie->debug_id, state, want_state);

switch (state) {
case FSCACHE_COOKIE_STATE_LOOKING_UP:
@@ -140,7 +140,7 @@ static int fscache_begin_operation(struct netfs_cache_resources *cres,
cres->cache_priv = NULL;
cres->ops = NULL;
fscache_end_cookie_access(cookie, fscache_access_io_not_live);
- kleave(" = -ENOBUFS");
+ _leave(" = -ENOBUFS");
return -ENOBUFS;
}

@@ -224,7 +224,7 @@ void __fscache_write_to_cache(struct fscache_cookie *cookie,
if (len == 0)
goto abandon;

- kenter("%llx,%zx", start, len);
+ _enter("%llx,%zx", start, len);

wreq = kzalloc(sizeof(struct fscache_write_request), GFP_NOFS);
if (!wreq)
diff --git a/fs/netfs/fscache_main.c b/fs/netfs/fscache_main.c
index bf9b33d26e31..42e98bb523e3 100644
--- a/fs/netfs/fscache_main.c
+++ b/fs/netfs/fscache_main.c
@@ -99,7 +99,7 @@ int __init fscache_init(void)
*/
void __exit fscache_exit(void)
{
- kenter("");
+ _enter("");

kmem_cache_destroy(fscache_cookie_jar);
fscache_proc_cleanup();
diff --git a/fs/netfs/fscache_volume.c b/fs/netfs/fscache_volume.c
index 2e2a405ca9b0..cb75c07b5281 100644
--- a/fs/netfs/fscache_volume.c
+++ b/fs/netfs/fscache_volume.c
@@ -264,7 +264,7 @@ static struct fscache_volume *fscache_alloc_volume(const char *volume_key,
fscache_see_volume(volume, fscache_volume_new_acquire);
fscache_stat(&fscache_n_volumes);
up_write(&fscache_addremove_sem);
- kleave(" = v=%x", volume->debug_id);
+ _leave(" = v=%x", volume->debug_id);
return volume;

err_vol:
@@ -466,7 +466,7 @@ void fscache_withdraw_volume(struct fscache_volume *volume)
{
int n_accesses;

- kdebug("withdraw V=%x", volume->debug_id);
+ _debug("withdraw V=%x", volume->debug_id);

/* Allow wakeups on dec-to-0 */
n_accesses = atomic_dec_return(&volume->n_accesses);
diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h
index 21e46bc9aa49..7773f3d855a9 100644
--- a/fs/netfs/internal.h
+++ b/fs/netfs/internal.h
@@ -34,6 +34,7 @@ int netfs_begin_read(struct netfs_io_request *rreq, bool sync);
/*
* main.c
*/
+extern unsigned int netfs_debug;
extern struct list_head netfs_io_requests;
extern spinlock_t netfs_proc_lock;
extern mempool_t netfs_request_pool;
@@ -353,12 +354,42 @@ void fscache_create_volume(struct fscache_volume *volume, bool wait);
* debug tracing
*/
#define dbgprintk(FMT, ...) \
- pr_debug("[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)
+ printk("[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)

#define kenter(FMT, ...) dbgprintk("==> %s("FMT")", __func__, ##__VA_ARGS__)
#define kleave(FMT, ...) dbgprintk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
#define kdebug(FMT, ...) dbgprintk(FMT, ##__VA_ARGS__)

+#ifdef __KDEBUG
+#define _enter(FMT, ...) kenter(FMT, ##__VA_ARGS__)
+#define _leave(FMT, ...) kleave(FMT, ##__VA_ARGS__)
+#define _debug(FMT, ...) kdebug(FMT, ##__VA_ARGS__)
+
+#elif defined(CONFIG_NETFS_DEBUG)
+#define _enter(FMT, ...) \
+do { \
+ if (netfs_debug) \
+ kenter(FMT, ##__VA_ARGS__); \
+} while (0)
+
+#define _leave(FMT, ...) \
+do { \
+ if (netfs_debug) \
+ kleave(FMT, ##__VA_ARGS__); \
+} while (0)
+
+#define _debug(FMT, ...) \
+do { \
+ if (netfs_debug) \
+ kdebug(FMT, ##__VA_ARGS__); \
+} while (0)
+
+#else
+#define _enter(FMT, ...) no_printk("==> %s("FMT")", __func__, ##__VA_ARGS__)
+#define _leave(FMT, ...) no_printk("<== %s()"FMT"", __func__, ##__VA_ARGS__)
+#define _debug(FMT, ...) no_printk(FMT, ##__VA_ARGS__)
+#endif
+
/*
* assertions
*/
diff --git a/fs/netfs/io.c b/fs/netfs/io.c
index c7576481c321..c93851b98368 100644
--- a/fs/netfs/io.c
+++ b/fs/netfs/io.c
@@ -130,7 +130,7 @@ static void netfs_reset_subreq_iter(struct netfs_io_request *rreq,
if (count == remaining)
return;

- kdebug("R=%08x[%u] ITER RESUB-MISMATCH %zx != %zx-%zx-%llx %x\n",
+ _debug("R=%08x[%u] ITER RESUB-MISMATCH %zx != %zx-%zx-%llx %x\n",
rreq->debug_id, subreq->debug_index,
iov_iter_count(&subreq->io_iter), subreq->transferred,
subreq->len, rreq->i_size,
@@ -326,7 +326,7 @@ void netfs_subreq_terminated(struct netfs_io_subrequest *subreq,
struct netfs_io_request *rreq = subreq->rreq;
int u;

- kenter("R=%x[%x]{%llx,%lx},%zd",
+ _enter("R=%x[%x]{%llx,%lx},%zd",
rreq->debug_id, subreq->debug_index,
subreq->start, subreq->flags, transferred_or_error);

@@ -435,7 +435,7 @@ netfs_rreq_prepare_read(struct netfs_io_request *rreq,
struct netfs_inode *ictx = netfs_inode(rreq->inode);
size_t lsize;

- kenter("%llx-%llx,%llx", subreq->start, subreq->start + subreq->len, rreq->i_size);
+ _enter("%llx-%llx,%llx", subreq->start, subreq->start + subreq->len, rreq->i_size);

if (rreq->origin != NETFS_DIO_READ) {
source = netfs_cache_prepare_read(subreq, rreq->i_size);
@@ -518,7 +518,7 @@ static bool netfs_rreq_submit_slice(struct netfs_io_request *rreq,
subreq->start = rreq->start + rreq->submitted;
subreq->len = io_iter->count;

- kdebug("slice %llx,%zx,%llx", subreq->start, subreq->len, rreq->submitted);
+ _debug("slice %llx,%zx,%llx", subreq->start, subreq->len, rreq->submitted);
list_add_tail(&subreq->rreq_link, &rreq->subrequests);

/* Call out to the cache to find out what it can do with the remaining
@@ -570,7 +570,7 @@ int netfs_begin_read(struct netfs_io_request *rreq, bool sync)
struct iov_iter io_iter;
int ret;

- kenter("R=%x %llx-%llx",
+ _enter("R=%x %llx-%llx",
rreq->debug_id, rreq->start, rreq->start + rreq->len - 1);

if (rreq->len == 0) {
@@ -593,7 +593,7 @@ int netfs_begin_read(struct netfs_io_request *rreq, bool sync)
atomic_set(&rreq->nr_outstanding, 1);
io_iter = rreq->io_iter;
do {
- kdebug("submit %llx + %llx >= %llx",
+ _debug("submit %llx + %llx >= %llx",
rreq->start, rreq->submitted, rreq->i_size);
if (rreq->origin == NETFS_DIO_READ &&
rreq->start + rreq->submitted >= rreq->i_size)
diff --git a/fs/netfs/main.c b/fs/netfs/main.c
index db824c372842..5f0f438e5d21 100644
--- a/fs/netfs/main.c
+++ b/fs/netfs/main.c
@@ -20,6 +20,10 @@ MODULE_LICENSE("GPL");

EXPORT_TRACEPOINT_SYMBOL(netfs_sreq);

+unsigned netfs_debug;
+module_param_named(debug, netfs_debug, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(netfs_debug, "Netfs support debugging mask");
+
static struct kmem_cache *netfs_request_slab;
static struct kmem_cache *netfs_subrequest_slab;
mempool_t netfs_request_pool;
diff --git a/fs/netfs/misc.c b/fs/netfs/misc.c
index 172808e83ca8..83e644bd518f 100644
--- a/fs/netfs/misc.c
+++ b/fs/netfs/misc.c
@@ -26,7 +26,7 @@ bool netfs_dirty_folio(struct address_space *mapping, struct folio *folio)
struct fscache_cookie *cookie = netfs_i_cookie(ictx);
bool need_use = false;

- kenter("");
+ _enter("");

if (!filemap_dirty_folio(mapping, folio))
return false;
@@ -99,7 +99,7 @@ void netfs_invalidate_folio(struct folio *folio, size_t offset, size_t length)
struct netfs_folio *finfo;
size_t flen = folio_size(folio);

- kenter("{%lx},%zx,%zx", folio->index, offset, length);
+ _enter("{%lx},%zx,%zx", folio->index, offset, length);

if (!folio_test_private(folio))
return;
diff --git a/fs/netfs/write_collect.c b/fs/netfs/write_collect.c
index 488147439fe0..426cf87aaf2e 100644
--- a/fs/netfs/write_collect.c
+++ b/fs/netfs/write_collect.c
@@ -161,7 +161,7 @@ static void netfs_retry_write_stream(struct netfs_io_request *wreq,
{
struct list_head *next;

- kenter("R=%x[%x:]", wreq->debug_id, stream->stream_nr);
+ _enter("R=%x[%x:]", wreq->debug_id, stream->stream_nr);

if (list_empty(&stream->subrequests))
return;
@@ -374,7 +374,7 @@ static void netfs_collect_write_results(struct netfs_io_request *wreq)
unsigned int notes;
int s;

- kenter("%llx-%llx", wreq->start, wreq->start + wreq->len);
+ _enter("%llx-%llx", wreq->start, wreq->start + wreq->len);
trace_netfs_collect(wreq);
trace_netfs_rreq(wreq, netfs_rreq_trace_collect);

@@ -409,7 +409,7 @@ static void netfs_collect_write_results(struct netfs_io_request *wreq)
front = stream->front;
while (front) {
trace_netfs_collect_sreq(wreq, front);
- //kdebug("sreq [%x] %llx %zx/%zx",
+ //_debug("sreq [%x] %llx %zx/%zx",
// front->debug_index, front->start, front->transferred, front->len);

/* Stall if there may be a discontinuity. */
@@ -598,7 +598,7 @@ static void netfs_collect_write_results(struct netfs_io_request *wreq)
out:
netfs_put_group_many(wreq->group, wreq->nr_group_rel);
wreq->nr_group_rel = 0;
- kleave(" = %x", notes);
+ _leave(" = %x", notes);
return;

need_retry:
@@ -606,7 +606,7 @@ static void netfs_collect_write_results(struct netfs_io_request *wreq)
* that any partially completed op will have had any wholly transferred
* folios removed from it.
*/
- kdebug("retry");
+ _debug("retry");
netfs_retry_writes(wreq);
goto out;
}
@@ -621,7 +621,7 @@ void netfs_write_collection_worker(struct work_struct *work)
size_t transferred;
int s;

- kenter("R=%x", wreq->debug_id);
+ _enter("R=%x", wreq->debug_id);

netfs_see_request(wreq, netfs_rreq_trace_see_work);
if (!test_bit(NETFS_RREQ_IN_PROGRESS, &wreq->flags)) {
@@ -684,7 +684,7 @@ void netfs_write_collection_worker(struct work_struct *work)
if (wreq->origin == NETFS_DIO_WRITE)
inode_dio_end(wreq->inode);

- kdebug("finished");
+ _debug("finished");
trace_netfs_rreq(wreq, netfs_rreq_trace_wake_ip);
clear_bit_unlock(NETFS_RREQ_IN_PROGRESS, &wreq->flags);
wake_up_bit(&wreq->flags, NETFS_RREQ_IN_PROGRESS);
@@ -744,7 +744,7 @@ void netfs_write_subrequest_terminated(void *_op, ssize_t transferred_or_error,
struct netfs_io_request *wreq = subreq->rreq;
struct netfs_io_stream *stream = &wreq->io_streams[subreq->stream_nr];

- kenter("%x[%x] %zd", wreq->debug_id, subreq->debug_index, transferred_or_error);
+ _enter("%x[%x] %zd", wreq->debug_id, subreq->debug_index, transferred_or_error);

switch (subreq->source) {
case NETFS_UPLOAD_TO_SERVER:
diff --git a/fs/netfs/write_issue.c b/fs/netfs/write_issue.c
index d7c971df8866..ec6cf8707fb0 100644
--- a/fs/netfs/write_issue.c
+++ b/fs/netfs/write_issue.c
@@ -99,7 +99,7 @@ struct netfs_io_request *netfs_create_write_req(struct address_space *mapping,
if (IS_ERR(wreq))
return wreq;

- kenter("R=%x", wreq->debug_id);
+ _enter("R=%x", wreq->debug_id);

ictx = netfs_inode(wreq->inode);
if (test_bit(NETFS_RREQ_WRITE_TO_CACHE, &wreq->flags))
@@ -159,7 +159,7 @@ static void netfs_prepare_write(struct netfs_io_request *wreq,
subreq->max_nr_segs = INT_MAX;
subreq->stream_nr = stream->stream_nr;

- kenter("R=%x[%x]", wreq->debug_id, subreq->debug_index);
+ _enter("R=%x[%x]", wreq->debug_id, subreq->debug_index);

trace_netfs_sreq_ref(wreq->debug_id, subreq->debug_index,
refcount_read(&subreq->ref),
@@ -215,7 +215,7 @@ static void netfs_do_issue_write(struct netfs_io_stream *stream,
{
struct netfs_io_request *wreq = subreq->rreq;

- kenter("R=%x[%x],%zx", wreq->debug_id, subreq->debug_index, subreq->len);
+ _enter("R=%x[%x],%zx", wreq->debug_id, subreq->debug_index, subreq->len);

if (test_bit(NETFS_SREQ_FAILED, &subreq->flags))
return netfs_write_subrequest_terminated(subreq, subreq->error, false);
@@ -272,11 +272,11 @@ int netfs_advance_write(struct netfs_io_request *wreq,
size_t part;

if (!stream->avail) {
- kleave("no write");
+ _leave("no write");
return len;
}

- kenter("R=%x[%x]", wreq->debug_id, subreq ? subreq->debug_index : 0);
+ _enter("R=%x[%x]", wreq->debug_id, subreq ? subreq->debug_index : 0);

if (subreq && start != subreq->start + subreq->len) {
netfs_issue_write(wreq, stream);
@@ -288,7 +288,7 @@ int netfs_advance_write(struct netfs_io_request *wreq,
subreq = stream->construct;

part = min(subreq->max_len - subreq->len, len);
- kdebug("part %zx/%zx %zx/%zx", subreq->len, subreq->max_len, part, len);
+ _debug("part %zx/%zx %zx/%zx", subreq->len, subreq->max_len, part, len);
subreq->len += part;
subreq->nr_segs++;

@@ -319,7 +319,7 @@ static int netfs_write_folio(struct netfs_io_request *wreq,
bool to_eof = false, streamw = false;
bool debug = false;

- kenter("");
+ _enter("");

/* netfs_perform_write() may shift i_size around the page or from out
* of the page to beyond it, but cannot move i_size into or through the
@@ -329,7 +329,7 @@ static int netfs_write_folio(struct netfs_io_request *wreq,

if (fpos >= i_size) {
/* mmap beyond eof. */
- kdebug("beyond eof");
+ _debug("beyond eof");
folio_start_writeback(folio);
folio_unlock(folio);
wreq->nr_group_rel += netfs_folio_written_back(folio);
@@ -363,7 +363,7 @@ static int netfs_write_folio(struct netfs_io_request *wreq,
}
flen -= foff;

- kdebug("folio %zx %zx %zx", foff, flen, fsize);
+ _debug("folio %zx %zx %zx", foff, flen, fsize);

/* Deal with discontinuities in the stream of dirty pages. These can
* arise from a number of sources:
@@ -487,7 +487,7 @@ static int netfs_write_folio(struct netfs_io_request *wreq,
for (int s = 0; s < NR_IO_STREAMS; s++)
netfs_issue_write(wreq, &wreq->io_streams[s]);

- kleave(" = 0");
+ _leave(" = 0");
return 0;
}

@@ -522,7 +522,7 @@ int netfs_writepages(struct address_space *mapping,
netfs_stat(&netfs_n_wh_writepages);

do {
- kdebug("wbiter %lx %llx", folio->index, wreq->start + wreq->submitted);
+ _debug("wbiter %lx %llx", folio->index, wreq->start + wreq->submitted);

/* It appears we don't have to handle cyclic writeback wrapping. */
WARN_ON_ONCE(wreq && folio_pos(folio) < wreq->start + wreq->submitted);
@@ -546,14 +546,14 @@ int netfs_writepages(struct address_space *mapping,
mutex_unlock(&ictx->wb_lock);

netfs_put_request(wreq, false, netfs_rreq_trace_put_return);
- kleave(" = %d", error);
+ _leave(" = %d", error);
return error;

couldnt_start:
netfs_kill_dirty_pages(mapping, wbc, folio);
out:
mutex_unlock(&ictx->wb_lock);
- kleave(" = %d", error);
+ _leave(" = %d", error);
return error;
}
EXPORT_SYMBOL(netfs_writepages);
@@ -590,7 +590,7 @@ int netfs_advance_writethrough(struct netfs_io_request *wreq, struct writeback_c
struct folio *folio, size_t copied, bool to_page_end,
struct folio **writethrough_cache)
{
- kenter("R=%x ic=%zu ws=%u cp=%zu tp=%u",
+ _enter("R=%x ic=%zu ws=%u cp=%zu tp=%u",
wreq->debug_id, wreq->iter.count, wreq->wsize, copied, to_page_end);

if (!*writethrough_cache) {
@@ -624,7 +624,7 @@ int netfs_end_writethrough(struct netfs_io_request *wreq, struct writeback_contr
struct netfs_inode *ictx = netfs_inode(wreq->inode);
int ret;

- kenter("R=%x", wreq->debug_id);
+ _enter("R=%x", wreq->debug_id);

if (writethrough_cache)
netfs_write_folio(wreq, wbc, writethrough_cache);
@@ -657,7 +657,7 @@ int netfs_unbuffered_write(struct netfs_io_request *wreq, bool may_wait, size_t
loff_t start = wreq->start;
int error = 0;

- kenter("%zx", len);
+ _enter("%zx", len);

if (wreq->origin == NETFS_DIO_WRITE)
inode_dio_begin(wreq->inode);
@@ -665,7 +665,7 @@ int netfs_unbuffered_write(struct netfs_io_request *wreq, bool may_wait, size_t
while (len) {
// TODO: Prepare content encryption

- kdebug("unbuffered %zx", len);
+ _debug("unbuffered %zx", len);
part = netfs_advance_write(wreq, upload, start, len, false);
start += part;
len -= part;
@@ -684,6 +684,6 @@ int netfs_unbuffered_write(struct netfs_io_request *wreq, bool may_wait, size_t
if (list_empty(&upload->subrequests))
netfs_wake_write_collector(wreq, false);

- kleave(" = %d", error);
+ _leave(" = %d", error);
return error;
}