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vfs_fruit: add AppleDouble xattr structure definitions

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Reference:
https://opensource.apple.com/source/xnu/xnu-4570.1.46/bsd/vfs/vfs_xattr.c

Bug: https://bugzilla.samba.org/show_bug.cgi?id=13076

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
This commit is contained in:
Ralph Boehme 2017-10-10 16:03:13 +02:00
parent 3d7932a332
commit b5a664e258
1 changed files with 38 additions and 0 deletions
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38
source3/modules/vfs_fruit.c
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@ -345,12 +345,48 @@ typedef enum {ADOUBLE_META, ADOUBLE_RSRC} adouble_type_t;
#define AD_DATE_FROM_UNIX(x) (htonl((x) - AD_DATE_DELTA))
#define AD_DATE_TO_UNIX(x) (ntohl(x) + AD_DATE_DELTA)
#define AD_XATTR_HDR_MAGIC 0x41545452 /* 'ATTR' */
#define AD_XATTR_MAX_ENTRIES 1024 /* Some arbitrarily enforced limit */
#define AD_XATTR_HDR_SIZE 36
#define AD_XATTR_MAX_HDR_SIZE 65536
/* Accessor macros */
#define ad_getentrylen(ad,eid) ((ad)->ad_eid[(eid)].ade_len)
#define ad_getentryoff(ad,eid) ((ad)->ad_eid[(eid)].ade_off)
#define ad_setentrylen(ad,eid,len) ((ad)->ad_eid[(eid)].ade_len = (len))
#define ad_setentryoff(ad,eid,off) ((ad)->ad_eid[(eid)].ade_off = (off))
/*
* Both struct ad_xattr_header and struct ad_xattr_entry describe the in memory
* representation as well as the on-disk format.
*
* The ad_xattr_header follows the FinderInfo data in the FinderInfo entry if
* the length of the FinderInfo entry is larger then 32 bytes. It is then
* preceeded with 2 bytes padding.
*
* Cf: https://opensource.apple.com/source/xnu/xnu-4570.1.46/bsd/vfs/vfs_xattr.c
*/
struct ad_xattr_header {
uint32_t adx_magic; /* ATTR_HDR_MAGIC */
uint32_t adx_debug_tag; /* for debugging == file id of owning file */
uint32_t adx_total_size; /* file offset of end of attribute header + entries + data */
uint32_t adx_data_start; /* file offset to attribute data area */
uint32_t adx_data_length; /* length of attribute data area */
uint32_t adx_reserved[3];
uint16_t adx_flags;
uint16_t adx_num_attrs;
};
/* On-disk entries are aligned on 4 byte boundaries */
struct ad_xattr_entry {
uint32_t adx_offset; /* file offset to data */
uint32_t adx_length; /* size of attribute data */
uint16_t adx_flags;
uint8_t adx_namelen; /* included the NULL terminator */
char *adx_name; /* NULL-terminated UTF-8 name */
};
struct ad_entry {
size_t ade_off;
size_t ade_len;
@ -365,6 +401,8 @@ struct adouble {
uint32_t ad_version;
struct ad_entry ad_eid[ADEID_MAX];
char *ad_data;
struct ad_xattr_header adx_header;
struct ad_xattr_entry *adx_entries;
};
struct ad_entry_order {