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authorDavid Howells <dhowells@redhat.com>2022-02-17 18:01:24 +0300
committerDavid Howells <dhowells@redhat.com>2022-03-18 12:24:00 +0300
commit6cd3d6fd1fe2feae5ff9f6a821081569bb140bf4 (patch)
tree1a8fce9f17a0ef5e991ddd3691358f65738e7bd0 /include/linux/netfs.h
parentde74023befa1876f64bc5871a2a4a51850517118 (diff)
downloadlinux-6cd3d6fd1fe2feae5ff9f6a821081569bb140bf4.tar.xz
netfs: Trace refcounting on the netfs_io_subrequest struct
Add refcount tracing for the netfs_io_subrequest structure. Changes ======= ver #3) - Switch 'W=' to 'R=' in the traceline to match other request debug IDs. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/164622998584.3564931.5052255990645723639.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/164678202603.1200972.14726007419792315578.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/164692901860.2099075.4845820886851239935.stgit@warthog.procyon.org.uk/ # v3
Diffstat (limited to 'include/linux/netfs.h')
-rw-r--r--include/linux/netfs.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 541aebe828f3..c702bd8ea8da 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -18,6 +18,8 @@
#include <linux/fs.h>
#include <linux/pagemap.h>
+enum netfs_sreq_ref_trace;
+
/*
* Overload PG_private_2 to give us PG_fscache - this is used to indicate that
* a page is currently backed by a local disk cache
@@ -136,7 +138,7 @@ struct netfs_io_subrequest {
loff_t start; /* Where to start the I/O */
size_t len; /* Size of the I/O */
size_t transferred; /* Amount of data transferred */
- refcount_t usage;
+ refcount_t ref;
short error; /* 0 or error that occurred */
unsigned short debug_index; /* Index in list (for debugging output) */
enum netfs_io_source source; /* Where to read from/write to */
@@ -268,6 +270,10 @@ extern int netfs_write_begin(struct file *, struct address_space *,
void *);
extern void netfs_subreq_terminated(struct netfs_io_subrequest *, ssize_t, bool);
+extern void netfs_get_subrequest(struct netfs_io_subrequest *subreq,
+ enum netfs_sreq_ref_trace what);
+extern void netfs_put_subrequest(struct netfs_io_subrequest *subreq,
+ bool was_async, enum netfs_sreq_ref_trace what);
extern void netfs_stats_show(struct seq_file *);
#endif /* _LINUX_NETFS_H */