ocfs2: Add extended attribute support
This patch implements storing extended attributes both in inode or a single
external block. We only store EA's in-inode when blocksize > 512 or that
inode block has free space for it. When an EA's value is larger than 80
bytes, we will store the value via b-tree outside inode or block.
Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 9bdb3ae..3b04f5d 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -64,6 +64,7 @@
#include "sysfile.h"
#include "uptodate.h"
#include "ver.h"
+#include "xattr.h"
#include "buffer_head_io.h"
@@ -154,6 +155,8 @@
Opt_localalloc,
Opt_localflocks,
Opt_stack,
+ Opt_user_xattr,
+ Opt_nouser_xattr,
Opt_err,
};
@@ -173,6 +176,8 @@
{Opt_localalloc, "localalloc=%d"},
{Opt_localflocks, "localflocks"},
{Opt_stack, "cluster_stack=%s"},
+ {Opt_user_xattr, "user_xattr"},
+ {Opt_nouser_xattr, "nouser_xattr"},
{Opt_err, NULL}
};
@@ -848,6 +853,12 @@
case Opt_data_writeback:
mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
break;
+ case Opt_user_xattr:
+ mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
+ break;
+ case Opt_nouser_xattr:
+ mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
+ break;
case Opt_atime_quantum:
if (match_int(&args[0], &option)) {
status = 0;
@@ -1135,6 +1146,7 @@
oi->ip_dir_start_lookup = 0;
init_rwsem(&oi->ip_alloc_sem);
+ init_rwsem(&oi->ip_xattr_sem);
mutex_init(&oi->ip_io_mutex);
oi->ip_blkno = 0ULL;
@@ -1378,6 +1390,7 @@
sb->s_fs_info = osb;
sb->s_op = &ocfs2_sops;
sb->s_export_op = &ocfs2_export_ops;
+ sb->s_xattr = ocfs2_xattr_handlers;
sb->s_time_gran = 1;
sb->s_flags |= MS_NOATIME;
/* this is needed to support O_LARGEFILE */
@@ -1574,6 +1587,7 @@
osb->first_cluster_group_blkno =
le64_to_cpu(di->id2.i_super.s_first_cluster_group);
osb->fs_generation = le32_to_cpu(di->i_fs_generation);
+ osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
mlog(0, "vol_label: %s\n", osb->vol_label);
mlog(0, "uuid: %s\n", osb->uuid_str);
mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",