This patch add incompatible flag for extended attribute support.
This flag could protect EAs not destroyed by previous ocfs2-tools
or kernel modules.
Signed-off-by: Tiger Yang <[EMAIL PROTECTED]>
---
fs/ocfs2/ocfs2.h | 7 +++++++
fs/ocfs2/ocfs2_fs.h | 19 +++++++++++++------
fs/ocfs2/super.c | 3 ++-
fs/ocfs2/xattr.c | 12 ++++++++++++
4 files changed, 34 insertions(+), 7 deletions(-)
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 33ddb7d..1fcd09c 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -329,6 +329,13 @@ static inline int ocfs2_supports_inline_data(struct
ocfs2_super *osb)
return 0;
}
+static inline int ocfs2_supports_xattr(struct ocfs2_super *osb)
+{
+ if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR)
+ return 1;
+ return 0;
+}
+
/* set / clear functions because cluster events can make these happen
* in parallel so we want the transitions to be atomic. this also
* means that any future flags osb_flags must be protected by spinlock
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 0a2019b..947130b 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -91,7 +91,8 @@
| OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \
| OCFS2_FEATURE_INCOMPAT_INLINE_DATA \
|
OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \
- |
OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK)
+ |
OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK \
+ | OCFS2_FEATURE_INCOMPAT_XATTR)
#define OCFS2_FEATURE_RO_COMPAT_SUPP OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
/*
@@ -128,10 +129,6 @@
/* 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
@@ -143,6 +140,12 @@
*/
#define OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK 0x0080
+/* Support for the extended slot map */
+#define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100
+
+/* Support for extended attributes */
+#define OCFS2_FEATURE_INCOMPAT_XATTR 0x0200
+
/*
* backup superblock flag is used to indicate that this volume
* has backup superblocks.
@@ -575,7 +578,11 @@ struct ocfs2_super_block {
/*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Selected userspace
stack. Only valid
with INCOMPAT flag. */
-/*B8*/ __le64 s_reserved2[17]; /* Fill out superblock */
+/*B8*/ __le16 s_xattr_inline_size; /* extended attribute inline size
+ for this fs*/
+ __le16 s_reserved0;
+ __le32 s_reserved1;
+/*C0*/ __le64 s_reserved2[16]; /* Fill out superblock */
/*140*/
/*
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 1202fb8..fc4eb4a 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1434,7 +1434,8 @@ static int ocfs2_initialize_super(struct super_block *sb,
osb->slot_num = OCFS2_INVALID_SLOT;
- osb->s_xattr_inline_size = OCFS2_MIN_XATTR_INLINE_SIZE;
+ osb->s_xattr_inline_size = le16_to_cpu(
+ di->id2.i_super.s_xattr_inline_size);
osb->local_alloc_state = OCFS2_LA_UNUSED;
osb->local_alloc_bh = NULL;
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 4589dec..9cd39ad 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -580,6 +580,9 @@ ssize_t ocfs2_listxattr(struct dentry *dentry,
struct ocfs2_dinode *di = NULL;
struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
+ if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
+ return -EOPNOTSUPP;
+
if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
return ret;
@@ -859,6 +862,9 @@ int ocfs2_xattr_get(struct inode *inode,
.not_found = -ENODATA,
};
+ if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
+ return -EOPNOTSUPP;
+
if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
ret = -ENODATA;
@@ -1557,6 +1563,9 @@ int ocfs2_xattr_remove(struct inode *inode, struct
buffer_head *di_bh)
handle_t *handle;
int ret;
+ if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
+ return 0;
+
if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
return 0;
@@ -1993,6 +2002,9 @@ int ocfs2_xattr_set(struct inode *inode,
.not_found = -ENODATA,
};
+ if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
+ return -EOPNOTSUPP;
+
ret = ocfs2_inode_lock(inode, &di_bh, 1);
if (ret < 0) {
mlog_errno(ret);
--
1.5.4.4
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