summaryrefslogtreecommitdiffstats
path: root/fs/dlm/lock.c
diff options
context:
space:
mode:
authorDavid Teigland <teigland@redhat.com>2007-05-18 09:00:32 -0500
committerSteven Whitehouse <swhiteho@redhat.com>2007-07-09 08:22:36 +0100
commitd7db923ea4990edb5583bf54af868ba687a1bc84 (patch)
tree3efa0db00a3a6400f43a65aef2726fa813f9dfa2 /fs/dlm/lock.c
parent3ae1acf93a21512512f8a78430fcde5992dd208e (diff)
downloadop-kernel-dev-d7db923ea4990edb5583bf54af868ba687a1bc84.zip
op-kernel-dev-d7db923ea4990edb5583bf54af868ba687a1bc84.tar.gz
[DLM] dlm_device interface changes [3/6]
Change the user/kernel device interface used by libdlm: - Add ability for userspace to check the version of the interface. libdlm can now adapt to different versions of the kernel interface. - Increase the size of the flags passed in a lock request so all possible flags can be used from userspace. - Add an opaque "xid" value for each lock. This "transaction id" will be used later to associate locks with each other during deadlock detection. - Add a "timeout" value for each lock. This is used along with the DLM_LKF_TIMEOUT flag. Also, remove a fragment of unused code in device_read(). This patch requires updating libdlm which is backward compatible with older kernels. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/dlm/lock.c')
-rw-r--r--fs/dlm/lock.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index ab986df..ad3797a 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -1098,6 +1098,8 @@ void dlm_scan_timeout(struct dlm_ls *ls)
}
if (do_cancel) {
+ log_debug("timeout cancel %x node %d %s", lkb->lkb_id,
+ lkb->lkb_nodeid, r->res_name);
lkb->lkb_flags &= ~DLM_IFL_WATCH_TIMEWARN;
lkb->lkb_flags |= DLM_IFL_TIMEOUT_CANCEL;
del_timeout(lkb);
@@ -1864,7 +1866,7 @@ static void confirm_master(struct dlm_rsb *r, int error)
}
static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
- int namelen, uint32_t parent_lkid, void *ast,
+ int namelen, unsigned long timeout_cs, void *ast,
void *astarg, void *bast, struct dlm_args *args)
{
int rv = -EINVAL;
@@ -1907,10 +1909,6 @@ static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
if (flags & DLM_LKF_VALBLK && !lksb->sb_lvbptr)
goto out;
- /* parent/child locks not yet supported */
- if (parent_lkid)
- goto out;
-
if (flags & DLM_LKF_CONVERT && !lksb->sb_lkid)
goto out;
@@ -1922,6 +1920,7 @@ static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
args->astaddr = ast;
args->astparam = (long) astarg;
args->bastaddr = bast;
+ args->timeout = timeout_cs;
args->mode = mode;
args->lksb = lksb;
rv = 0;
@@ -1976,6 +1975,7 @@ static int validate_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
lkb->lkb_lksb = args->lksb;
lkb->lkb_lvbptr = args->lksb->sb_lvbptr;
lkb->lkb_ownpid = (int) current->pid;
+ lkb->lkb_timeout_cs = args->timeout;
rv = 0;
out:
return rv;
@@ -2423,7 +2423,7 @@ int dlm_lock(dlm_lockspace_t *lockspace,
if (error)
goto out;
- error = set_lock_args(mode, lksb, flags, namelen, parent_lkid, ast,
+ error = set_lock_args(mode, lksb, flags, namelen, 0, ast,
astarg, bast, &args);
if (error)
goto out_put;
@@ -4175,7 +4175,7 @@ int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc)
int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
int mode, uint32_t flags, void *name, unsigned int namelen,
- uint32_t parent_lkid)
+ unsigned long timeout_cs)
{
struct dlm_lkb *lkb;
struct dlm_args args;
@@ -4203,7 +4203,7 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
When DLM_IFL_USER is set, the dlm knows that this is a userspace
lock and that lkb_astparam is the dlm_user_args structure. */
- error = set_lock_args(mode, &ua->lksb, flags, namelen, parent_lkid,
+ error = set_lock_args(mode, &ua->lksb, flags, namelen, timeout_cs,
DLM_FAKE_USER_AST, ua, DLM_FAKE_USER_AST, &args);
lkb->lkb_flags |= DLM_IFL_USER;
ua->old_mode = DLM_LOCK_IV;
@@ -4240,7 +4240,8 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
}
int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
- int mode, uint32_t flags, uint32_t lkid, char *lvb_in)
+ int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
+ unsigned long timeout_cs)
{
struct dlm_lkb *lkb;
struct dlm_args args;
@@ -4268,6 +4269,7 @@ int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
if (lvb_in && ua->lksb.sb_lvbptr)
memcpy(ua->lksb.sb_lvbptr, lvb_in, DLM_USER_LVB_LEN);
+ ua->xid = ua_tmp->xid;
ua->castparam = ua_tmp->castparam;
ua->castaddr = ua_tmp->castaddr;
ua->bastparam = ua_tmp->bastparam;
@@ -4275,8 +4277,8 @@ int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
ua->user_lksb = ua_tmp->user_lksb;
ua->old_mode = lkb->lkb_grmode;
- error = set_lock_args(mode, &ua->lksb, flags, 0, 0, DLM_FAKE_USER_AST,
- ua, DLM_FAKE_USER_AST, &args);
+ error = set_lock_args(mode, &ua->lksb, flags, 0, timeout_cs,
+ DLM_FAKE_USER_AST, ua, DLM_FAKE_USER_AST, &args);
if (error)
goto out_put;
OpenPOWER on IntegriCloud