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author | 2008-04-18 10:15:22 -0700 | |
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committer | 2008-04-18 10:15:22 -0700 | |
commit | e675349e2bdbfb661fa0d8ff2441b4cf48fb7e48 (patch) | |
tree | 7443e324c951f375945905dc436b012c98a00e05 /fs/ocfs2/ocfs2_fs.h | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw (diff) | |
parent | ocfs2/net: Add debug interface to o2net (diff) | |
download | linux-e675349e2bdbfb661fa0d8ff2441b4cf48fb7e48.tar.gz linux-e675349e2bdbfb661fa0d8ff2441b4cf48fb7e48.tar.bz2 linux-e675349e2bdbfb661fa0d8ff2441b4cf48fb7e48.zip |
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: (64 commits)
ocfs2/net: Add debug interface to o2net
ocfs2: Only build ocfs2/dlm with the o2cb stack module
ocfs2/cluster: Get rid of arguments to the timeout routines
ocfs2: Put tree in MAINTAINERS
ocfs2: Use BUG_ON
ocfs2: Convert ocfs2 over to unlocked_ioctl
ocfs2: Improve rename locking
fs/ocfs2/aops.c: test for IS_ERR rather than 0
ocfs2: Add inode stealing for ocfs2_reserve_new_inode
ocfs2: Add ac_alloc_slot in ocfs2_alloc_context
ocfs2: Add a new parameter for ocfs2_reserve_suballoc_bits
ocfs2: Enable cross extent block merge.
ocfs2: Add support for cross extent block
ocfs2: Move /sys/o2cb to /sys/fs/o2cb
sysfs: Allow removal of symlinks in the sysfs root
ocfs2: Reconnect after idle time out.
ocfs2/dlm: Cleanup lockres print
ocfs2/dlm: Fix lockname in lockres print function
ocfs2/dlm: Move dlm_print_one_mle() from dlmmaster.c to dlmdebug.c
ocfs2/dlm: Dumps the purgelist into a debugfs file
...
Diffstat (limited to 'fs/ocfs2/ocfs2_fs.h')
-rw-r--r-- | fs/ocfs2/ocfs2_fs.h | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index 3633edd3982f..52c426665154 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -88,7 +88,9 @@ #define OCFS2_FEATURE_COMPAT_SUPP OCFS2_FEATURE_COMPAT_BACKUP_SB #define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \ | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \ - | OCFS2_FEATURE_INCOMPAT_INLINE_DATA) + | OCFS2_FEATURE_INCOMPAT_INLINE_DATA \ + | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \ + | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK) #define OCFS2_FEATURE_RO_COMPAT_SUPP OCFS2_FEATURE_RO_COMPAT_UNWRITTEN /* @@ -125,6 +127,21 @@ /* Support for data packed into inode blocks */ #define OCFS2_FEATURE_INCOMPAT_INLINE_DATA 0x0040 +/* Support for the extended slot map */ +#define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100 + + +/* + * Support for alternate, userspace cluster stacks. If set, the superblock + * field s_cluster_info contains a tag for the alternate stack in use as + * well as the name of the cluster being joined. + * mount.ocfs2 must pass in a matching stack name. + * + * If not set, the classic stack will be used. This is compatbile with + * all older versions. + */ +#define OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK 0x0080 + /* * backup superblock flag is used to indicate that this volume * has backup superblocks. @@ -267,6 +284,10 @@ struct ocfs2_new_group_input { #define OCFS2_VOL_UUID_LEN 16 #define OCFS2_MAX_VOL_LABEL_LEN 64 +/* The alternate, userspace stack fields */ +#define OCFS2_STACK_LABEL_LEN 4 +#define OCFS2_CLUSTER_NAME_LEN 16 + /* Journal limits (in bytes) */ #define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024) @@ -475,6 +496,47 @@ struct ocfs2_extent_block }; /* + * On disk slot map for OCFS2. This defines the contents of the "slot_map" + * system file. A slot is valid if it contains a node number >= 0. The + * value -1 (0xFFFF) is OCFS2_INVALID_SLOT. This marks a slot empty. + */ +struct ocfs2_slot_map { +/*00*/ __le16 sm_slots[0]; +/* + * Actual on-disk size is one block. OCFS2_MAX_SLOTS is 255, + * 255 * sizeof(__le16) == 512B, within the 512B block minimum blocksize. + */ +}; + +struct ocfs2_extended_slot { +/*00*/ __u8 es_valid; + __u8 es_reserved1[3]; + __le32 es_node_num; +/*10*/ +}; + +/* + * The extended slot map, used when OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP + * is set. It separates out the valid marker from the node number, and + * has room to grow. Unlike the old slot map, this format is defined by + * i_size. + */ +struct ocfs2_slot_map_extended { +/*00*/ struct ocfs2_extended_slot se_slots[0]; +/* + * Actual size is i_size of the slot_map system file. It should + * match s_max_slots * sizeof(struct ocfs2_extended_slot) + */ +}; + +struct ocfs2_cluster_info { +/*00*/ __u8 ci_stack[OCFS2_STACK_LABEL_LEN]; + __le32 ci_reserved; +/*08*/ __u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN]; +/*18*/ +}; + +/* * On disk superblock for OCFS2 * Note that it is contained inside an ocfs2_dinode, so all offsets * are relative to the start of ocfs2_dinode.id2. @@ -506,7 +568,20 @@ 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*/ +/*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Selected userspace + stack. Only valid + with INCOMPAT flag. */ +/*B8*/ __le64 s_reserved2[17]; /* Fill out superblock */ +/*140*/ + + /* + * NOTE: As stated above, all offsets are relative to + * ocfs2_dinode.id2, which is at 0xC0 in the inode. + * 0xC0 + 0x140 = 0x200 or 512 bytes. A superblock must fit within + * our smallest blocksize, which is 512 bytes. To ensure this, + * we reserve the space in s_reserved2. Anything past s_reserved2 + * will not be available on the smallest blocksize. + */ }; /* |