lkml.org 
[lkml]   [2011]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[098/244] fs/9p: Use protocol-defined value for lock/getlock type field.
3.0-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Jim Garlick <garlick.jim@gmail.com>

commit 51b8b4fb32271d39fbdd760397406177b2b0fd36 upstream.

Signed-off-by: Jim Garlick <garlick@llnl.gov>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
fs/9p/vfs_file.c | 34 +++++++++++++++++++++++++++-------
include/net/9p/9p.h | 5 +++++
2 files changed, 32 insertions(+), 7 deletions(-)

--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -169,7 +169,18 @@ static int v9fs_file_do_lock(struct file

/* convert posix lock to p9 tlock args */
memset(&flock, 0, sizeof(flock));
- flock.type = fl->fl_type;
+ /* map the lock type */
+ switch (fl->fl_type) {
+ case F_RDLCK:
+ flock.type = P9_LOCK_TYPE_RDLCK;
+ break;
+ case F_WRLCK:
+ flock.type = P9_LOCK_TYPE_WRLCK;
+ break;
+ case F_UNLCK:
+ flock.type = P9_LOCK_TYPE_UNLCK;
+ break;
+ }
flock.start = fl->fl_start;
if (fl->fl_end == OFFSET_MAX)
flock.length = 0;
@@ -245,7 +256,7 @@ static int v9fs_file_getlock(struct file

/* convert posix lock to p9 tgetlock args */
memset(&glock, 0, sizeof(glock));
- glock.type = fl->fl_type;
+ glock.type = P9_LOCK_TYPE_UNLCK;
glock.start = fl->fl_start;
if (fl->fl_end == OFFSET_MAX)
glock.length = 0;
@@ -257,17 +268,26 @@ static int v9fs_file_getlock(struct file
res = p9_client_getlock_dotl(fid, &glock);
if (res < 0)
return res;
- if (glock.type != F_UNLCK) {
- fl->fl_type = glock.type;
+ /* map 9p lock type to os lock type */
+ switch (glock.type) {
+ case P9_LOCK_TYPE_RDLCK:
+ fl->fl_type = F_RDLCK;
+ break;
+ case P9_LOCK_TYPE_WRLCK:
+ fl->fl_type = F_WRLCK;
+ break;
+ case P9_LOCK_TYPE_UNLCK:
+ fl->fl_type = F_UNLCK;
+ break;
+ }
+ if (glock.type != P9_LOCK_TYPE_UNLCK) {
fl->fl_start = glock.start;
if (glock.length == 0)
fl->fl_end = OFFSET_MAX;
else
fl->fl_end = glock.start + glock.length - 1;
fl->fl_pid = glock.proc_id;
- } else
- fl->fl_type = F_UNLCK;
-
+ }
return res;
}

--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -344,6 +344,11 @@ enum p9_qid_t {
/* Room for readdir header */
#define P9_READDIRHDRSZ 24

+/* 9p2000.L lock type */
+#define P9_LOCK_TYPE_RDLCK 0
+#define P9_LOCK_TYPE_WRLCK 1
+#define P9_LOCK_TYPE_UNLCK 2
+
/**
* struct p9_str - length prefixed string type
* @len: length of the string



\
 
 \ /
  Last update: 2011-09-29 01:07    [W:1.392 / U:0.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site