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ocfs2: Add an incompat feature flag OCFS2_FEATURE_INCOMPAT_CLUSTERINFO

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OCFS2_FEATURE_INCOMPAT_CLUSTERINFO allows us to use sb->s_cluster_info for
both userspace and o2cb cluster stacks. It also allows us to extend cluster
info to include stack flags.

This patch also adds stackflags to sb->s_clusterinfo. It also introduces a
clusterinfo flag OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT to denote the enabled
global heartbeat mode.

This incompat flag can be set/cleared using tunefs.ocfs2 --fs-features. The
clusterinfo flag is set/cleared using tunefs.ocfs2 --update-cluster-stack.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
This commit is contained in:
Sunil Mushran 2010-10-09 10:24:46 -07:00
parent 54b5187b5a
commit 98f486f23b
3 changed files with 66 additions and 9 deletions
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31
fs/ocfs2/ocfs2.h
View File

@ -368,6 +368,8 @@ struct ocfs2_super
struct ocfs2_alloc_stats alloc_stats;
char dev_str[20]; /* "major,minor" of the device */
u8 osb_stackflags;
char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
struct ocfs2_cluster_connection *cconn;
struct ocfs2_lock_res osb_super_lockres;
@ -601,10 +603,35 @@ static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb)
return ret;
}
static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb)
{
return (osb->s_feature_incompat &
OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK);
(OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK |
OCFS2_FEATURE_INCOMPAT_CLUSTERINFO));
}
static inline int ocfs2_userspace_stack(struct ocfs2_super *osb)
{
if (ocfs2_clusterinfo_valid(osb) &&
memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
OCFS2_STACK_LABEL_LEN))
return 1;
return 0;
}
static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb)
{
if (ocfs2_clusterinfo_valid(osb) &&
!memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK,
OCFS2_STACK_LABEL_LEN))
return 1;
return 0;
}
static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb)
{
return ocfs2_o2cb_stack(osb) &&
(osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT);
}
static inline int ocfs2_mount_local(struct ocfs2_super *osb)

40
fs/ocfs2/ocfs2_fs.h
View File

@ -101,7 +101,8 @@
| OCFS2_FEATURE_INCOMPAT_META_ECC \
| OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS \
| OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE \
| OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG)
| OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG \
| OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)
#define OCFS2_FEATURE_RO_COMPAT_SUPP (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN \
| OCFS2_FEATURE_RO_COMPAT_USRQUOTA \
| OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
@ -169,6 +170,13 @@
/* Discontigous block groups */
#define OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG 0x2000
/*
* Incompat bit to indicate useable clusterinfo with stackflags for all
* cluster stacks (userspace adnd o2cb). If this bit is set,
* INCOMPAT_USERSPACE_STACK becomes superfluous and thus should not be set.
*/
#define OCFS2_FEATURE_INCOMPAT_CLUSTERINFO 0x4000
/*
* backup superblock flag is used to indicate that this volume
* has backup superblocks.
@ -292,10 +300,13 @@
#define OCFS2_VOL_UUID_LEN 16
#define OCFS2_MAX_VOL_LABEL_LEN 64
/* The alternate, userspace stack fields */
/* The cluster stack fields */
#define OCFS2_STACK_LABEL_LEN 4
#define OCFS2_CLUSTER_NAME_LEN 16
/* Classic (historically speaking) cluster stack */
#define OCFS2_CLASSIC_CLUSTER_STACK "o2cb"
/* Journal limits (in bytes) */
#define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024)
@ -305,6 +316,11 @@
*/
#define OCFS2_MIN_XATTR_INLINE_SIZE 256
/*
* Cluster info flags (ocfs2_cluster_info.ci_stackflags)
*/
#define OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT (0x01)
struct ocfs2_system_inode_info {
char *si_name;
int si_iflags;
@ -566,9 +582,21 @@ struct ocfs2_slot_map_extended {
*/
};
/*
* ci_stackflags is only valid if the incompat bit
* OCFS2_FEATURE_INCOMPAT_CLUSTERINFO is set.
*/
struct ocfs2_cluster_info {
/*00*/ __u8 ci_stack[OCFS2_STACK_LABEL_LEN];
__le32 ci_reserved;
union {
__le32 ci_reserved;
struct {
__u8 ci_stackflags;
__u8 ci_reserved1;
__u8 ci_reserved2;
__u8 ci_reserved3;
};
};
/*08*/ __u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN];
/*18*/
};
@ -605,9 +633,9 @@ struct ocfs2_super_block {
* group header */
/*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
/*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */
/*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Selected userspace
stack. Only valid
with INCOMPAT flag. */
/*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Only valid if either
userspace or clusterinfo
INCOMPAT flag set. */
/*B8*/ __le16 s_xattr_inline_size; /* extended attribute inline size
for this fs*/
__le16 s_reserved0;

4
fs/ocfs2/super.c
View File

@ -2149,7 +2149,9 @@ static int ocfs2_initialize_super(struct super_block *sb,
goto bail;
}
if (ocfs2_userspace_stack(osb)) {
if (ocfs2_clusterinfo_valid(osb)) {
osb->osb_stackflags =
OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
memcpy(osb->osb_cluster_stack,
OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
OCFS2_STACK_LABEL_LEN);