From: Joel Becker Date: Wed, 30 Jan 2008 23:38:24 +0000 (-0800) Subject: ocfs2: Abstract out node number queries. X-Git-Tag: v2.6.26-rc1~1143^2~51 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19fdb624dc8ccb663f6e48b3a3a3fa4e4e567fc1;p=linux-2.6 ocfs2: Abstract out node number queries. ocfs2 asks the cluster stack for the local node's node number for two reasons; to fill the slot map and to print it. While the slot map isn't necessary for userspace cluster stacks, the printing is very nice for debugging. Thus we add ocfs2_cluster_this_node() as a generic API to get this value. It is anticipated that the slot map will not be used under a userspace cluster stack, so validity checks of the node num only need to exist in the slot map code. Otherwise, it just gets used and printed as an opaque value. [ Fixed up some "int" versus "unsigned int" issues and made osb->node_num truly opaque. --Mark ] Signed-off-by: Joel Becker Signed-off-by: Mark Fasheh --- diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index 664e4fe3ea..7006abaffd 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -218,7 +218,7 @@ struct ocfs2_super unsigned int s_atime_quantum; unsigned int max_slots; - s16 node_num; + unsigned int node_num; int slot_num; int preferred_slot; int s_sectsize_bits; diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c index 63fb1b26d9..bb5ff8939b 100644 --- a/fs/ocfs2/slot_map.c +++ b/fs/ocfs2/slot_map.c @@ -73,8 +73,6 @@ static void ocfs2_set_slot(struct ocfs2_slot_info *si, int slot_num, unsigned int node_num) { BUG_ON((slot_num < 0) || (slot_num >= si->si_num_slots)); - BUG_ON((node_num == O2NM_INVALID_NODE_NUM) || - (node_num >= O2NM_MAX_NODES)); si->si_slots[slot_num].sl_valid = 1; si->si_slots[slot_num].sl_node_num = node_num; diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c index f6f309a083..814686356c 100644 --- a/fs/ocfs2/stackglue.c +++ b/fs/ocfs2/stackglue.c @@ -25,6 +25,8 @@ #include #include "cluster/masklog.h" +#include "cluster/nodemanager.h" + #include "stackglue.h" static struct ocfs2_locking_protocol *lproto; @@ -371,6 +373,21 @@ int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn) return 0; } +int ocfs2_cluster_this_node(unsigned int *node) +{ + int node_num; + + node_num = o2nm_this_node(); + if (node_num == O2NM_INVALID_NODE_NUM) + return -ENOENT; + + if (node_num >= O2NM_MAX_NODES) + return -EOVERFLOW; + + *node = node_num; + return 0; +} + void o2cb_get_stack(struct ocfs2_locking_protocol *proto) { BUG_ON(proto == NULL); diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h index 3900b5c393..ccb03991b5 100644 --- a/fs/ocfs2/stackglue.h +++ b/fs/ocfs2/stackglue.h @@ -74,6 +74,7 @@ int ocfs2_cluster_connect(const char *group, void *recovery_data, struct ocfs2_cluster_connection **conn); int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn); +int ocfs2_cluster_this_node(unsigned int *node); int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn, int mode, diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 0ee4975746..d3c4d323fa 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -694,7 +694,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) if (ocfs2_mount_local(osb)) snprintf(nodestr, sizeof(nodestr), "local"); else - snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num); + snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) " "with %s data mode.\n", @@ -1145,16 +1145,17 @@ static int ocfs2_fill_local_node_info(struct ocfs2_super *osb) * desirable. */ if (ocfs2_mount_local(osb)) osb->node_num = 0; - else - osb->node_num = o2nm_this_node(); - - if (osb->node_num == O2NM_MAX_NODES) { - mlog(ML_ERROR, "could not find this host's node number\n"); - status = -ENOENT; - goto bail; + else { + status = ocfs2_cluster_this_node(&osb->node_num); + if (status < 0) { + mlog_errno(status); + mlog(ML_ERROR, + "could not find this host's node number\n"); + goto bail; + } } - mlog(0, "I am node %d\n", osb->node_num); + mlog(0, "I am node %u\n", osb->node_num); status = 0; bail: @@ -1282,7 +1283,7 @@ static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) if (ocfs2_mount_local(osb)) snprintf(nodestr, sizeof(nodestr), "local"); else - snprintf(nodestr, sizeof(nodestr), "%d", osb->node_num); + snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num); printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n", osb->dev_str, nodestr); @@ -1384,7 +1385,6 @@ static int ocfs2_initialize_super(struct super_block *sb, osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM; - osb->node_num = O2NM_INVALID_NODE_NUM; osb->slot_num = OCFS2_INVALID_SLOT; osb->local_alloc_state = OCFS2_LA_UNUSED;