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 <[email protected]> --- fs/ocfs2/ocfs2.h | 31 +++++++++++++++++++++++++++++-- fs/ocfs2/ocfs2_fs.h | 40 ++++++++++++++++++++++++++++++++++------ fs/ocfs2/super.c | 4 +++- 3 files changed, 66 insertions(+), 9 deletions(-) diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index 5a3d08d..259015a 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -366,6 +366,8 @@ 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; @@ -592,10 +594,35 @@ 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) diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index bb37218..c936cf0 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -100,7 +100,8 @@ | OCFS2_FEATURE_INCOMPAT_XATTR \ | OCFS2_FEATURE_INCOMPAT_META_ECC \ | OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS \ - | OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) + | OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE \ + | 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) @@ -166,6 +167,13 @@ #define OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE 0x1000 /* + * 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 0x2000 + +/* * backup superblock flag is used to indicate that this volume * has backup superblocks. */ @@ -275,10 +283,13 @@ #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) @@ -296,6 +307,11 @@ */ #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; @@ -554,9 +570,21 @@ 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_reserved1; + __u8 ci_reserved2; + __u8 ci_reserved3; + __u8 ci_stackflags; + }; + }; /*08*/ __u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN]; /*18*/ }; @@ -593,9 +621,9 @@ 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; diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 7dfed85..6ecdc07 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -2162,7 +2162,9 @@ 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); -- 1.7.0.4 _______________________________________________ Ocfs2-devel mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-devel
