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ceph: support hidden vxattrs 

Add ability to flag virtual xattrs as hidden, such that you can
getxattr them but they do not appear in listxattr.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Sam Lang <sam.lang@inktank.com>
This commit is contained in:
Sage Weil 2013-01-31 11:53:27 -08:00
parent 39b648d9ec
commit 8860147a01
1 changed files with 11 additions and 9 deletions
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20
fs/ceph/xattr.c
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@ -29,7 +29,7 @@ struct ceph_vxattr {
size_t name_size; /* strlen(name) + 1 (for '\0') */ size_t name_size; /* strlen(name) + 1 (for '\0') */
size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val, size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val,
size_t size); size_t size);
bool readonly; bool readonly, hidden;
}; };
/* directories */ /* directories */
@ -85,13 +85,14 @@ static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
#define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name
#define XATTR_NAME_CEPH(_type, _name) \ #define XATTR_NAME_CEPH(_type, _name) \
{ \ { \
.name = CEPH_XATTR_NAME(_type, _name), \ .name = CEPH_XATTR_NAME(_type, _name), \
.name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \ .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \
.getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \
.readonly = true, \ .readonly = true, \
} .hidden = false, \
}
static struct ceph_vxattr ceph_dir_vxattrs[] = { static struct ceph_vxattr ceph_dir_vxattrs[] = {
XATTR_NAME_CEPH(dir, entries), XATTR_NAME_CEPH(dir, entries),
@ -157,7 +158,8 @@ static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs)
size_t size = 0; size_t size = 0;
for (vxattr = vxattrs; vxattr->name; vxattr++) for (vxattr = vxattrs; vxattr->name; vxattr++)
size += vxattr->name_size; if (!vxattr->hidden)
size += vxattr->name_size;
return size; return size;
} }