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locks: make /proc/locks show IS_FILE_PVT locks as type "FLPVT" 

In a later patch, we'll be adding a new type of lock that's owned by
the struct file instead of the files_struct. Those sorts of locks
will be flagged with a new FL_FILE_PVT flag.

Report these types of locks as "FLPVT" in /proc/locks to distinguish
them from "classic" POSIX locks.

Acked-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
This commit is contained in:
Jeff Layton 2014-02-03 12:13:09 -05:00
parent 78ed8a1338
commit c918d42a27
2 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
fs/locks.c
View File

@ -135,6 +135,7 @@
#define IS_POSIX(fl) (fl->fl_flags & FL_POSIX)
#define IS_FLOCK(fl) (fl->fl_flags & FL_FLOCK)
#define IS_LEASE(fl) (fl->fl_flags & (FL_LEASE|FL_DELEG))
#define IS_FILE_PVT(fl) (fl->fl_flags & FL_FILE_PVT)
static bool lease_breaking(struct file_lock *fl)
{
@ -2313,8 +2314,14 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl,
seq_printf(f, "%lld:%s ", id, pfx);
if (IS_POSIX(fl)) {
seq_printf(f, "%6s %s ",
(fl->fl_flags & FL_ACCESS) ? "ACCESS" : "POSIX ",
if (fl->fl_flags & FL_ACCESS)
seq_printf(f, "ACCESS");
else if (IS_FILE_PVT(fl))
seq_printf(f, "FLPVT ");
else
seq_printf(f, "POSIX ");
seq_printf(f, " %s ",
(inode == NULL) ? "*NOINODE*" :
mandatory_lock(inode) ? "MANDATORY" : "ADVISORY ");
} else if (IS_FLOCK(fl)) {

1
include/linux/fs.h
View File

@ -888,6 +888,7 @@ static inline int file_check_writeable(struct file *filp)
#define FL_SLEEP 128 /* A blocking lock */
#define FL_DOWNGRADE_PENDING 256 /* Lease is being downgraded */
#define FL_UNLOCK_PENDING 512 /* Lease is being broken */
#define FL_FILE_PVT 1024 /* lock is private to the file */
/*
* Special return value from posix_lock_file() and vfs_lock_file() for