#ifndef _FS_XFS_DIR2_SF_H
#define _FS_XFS_DIR2_SF_H
#ident "$Revision: 1.1 $"
/*
* xfs_dir2_sf.h
*
* Directory layout when stored internal to an inode.
*
* Small directories are packed as tightly as possible so as to
* fit into the literal area of the inode.
*/
struct dirent;
struct uio;
struct xfs_dabuf;
struct xfs_da_args;
struct xfs_dir2_block;
struct xfs_inode;
struct xfs_mount;
struct xfs_trans;
/*
* Maximum size of a shortform directory.
*/
#define XFS_DIR2_SF_MAX_SIZE \
(XFS_DINODE_MAX_SIZE - (uint)sizeof(xfs_dinode_core_t) - \
(uint)sizeof(xfs_agino_t))
/*
* Inode number stored as 8 8-bit values.
*/
typedef struct { __uint8_t i[8]; } xfs_dir2_ino8_t;
#if XFS_BIG_FILESYSTEMS
#define XFS_DIR2_SF_GET_INO8(di) \
(((xfs_intino_t)XFS_DI_LO((di).i8) & 0xffffffffULL) | \
((xfs_intino_t)XFS_DI_HI((di).i8) << 32))
#else
#define XFS_DIR2_SF_GET_INO8(di) XFS_DI_LO((di).i8)
#endif
/*
* Inode number stored as 4 8-bit values.
* Works a lot of the time, when all the inode numbers in a directory
* fit in 32 bits.
*/
typedef struct { __uint8_t i[4]; } xfs_dir2_ino4_t;
#ifdef __LITTLE_ENDIAN
#define XFS_DIR2_SF_GET_INO4(di) \
((uint)((di).i4.i[3] << 24) | (uint)((di).i4.i[2] << 16) | \
(uint)((di).i4.i[1] << 8) | (uint)((di).i4.i[0]))
#else
#define XFS_DIR2_SF_GET_INO4(di) \
((uint)((di).i4.i[0] << 24) | (uint)((di).i4.i[1] << 16) | \
(uint)((di).i4.i[2] << 8) | (uint)((di).i4.i[3]))
#endif
typedef union {
xfs_dir2_ino8_t i8;
xfs_dir2_ino4_t i4;
} xfs_dir2_inou_t;
#define XFS_DIR2_MAX_SHORT_INUM ((xfs_ino_t)0xffffffffULL)
/*
* Normalized offset (in a data block) of the entry, really xfs_dir2_data_off_t.
* Only need 16 bits, this is the byte offset into the single block form.
*/
typedef struct { __uint8_t i[2]; } xfs_dir2_sf_off_t;
/*
* The parent directory has a dedicated field, and the self-pointer must
* be calculated on the fly.
*
* Entries are packed toward the top as tightly as possible. The header
* and the elements must be bcopy()'d out into a work area to get correct
* alignment for the inode number fields.
*/
typedef struct xfs_dir2_sf_hdr {
__uint8_t count; /* count of entries */
__uint8_t i8count; /* count of 8-byte inode #s */
xfs_dir2_inou_t parent; /* parent dir inode number */
} xfs_dir2_sf_hdr_t;
typedef struct xfs_dir2_sf_entry {
__uint8_t namelen; /* actual name length */
xfs_dir2_sf_off_t offset; /* saved offset */
__uint8_t name[1]; /* name, variable size */
xfs_dir2_inou_t inumber; /* inode number, var. offset */
} xfs_dir2_sf_entry_t;
typedef struct xfs_dir2_sf {
xfs_dir2_sf_hdr_t hdr; /* shortform header */
xfs_dir2_sf_entry_t list[1]; /* shortform entries */
} xfs_dir2_sf_t;
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_HDR_SIZE)
int xfs_dir2_sf_hdr_size(int i8count);
#define XFS_DIR2_SF_HDR_SIZE(i8count) xfs_dir2_sf_hdr_size(i8count)
#else
#define XFS_DIR2_SF_HDR_SIZE(i8count) \
((uint)sizeof(xfs_dir2_sf_hdr_t) - \
((i8count) == 0) * \
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_INUMBERP)
xfs_dir2_inou_t *xfs_dir2_sf_inumberp(xfs_dir2_sf_entry_t *sfep);
#define XFS_DIR2_SF_INUMBERP(sfep) xfs_dir2_sf_inumberp(sfep)
#else
#define XFS_DIR2_SF_INUMBERP(sfep) \
((xfs_dir2_inou_t *)&(sfep)->name[(sfep)->namelen])
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_INUMBER)
xfs_intino_t xfs_dir2_sf_get_inumber(xfs_dir2_sf_t *sfp, xfs_dir2_inou_t *from);
#define XFS_DIR2_SF_GET_INUMBER(sfp, from) \
xfs_dir2_sf_get_inumber(sfp, from)
#else
#define XFS_DIR2_SF_GET_INUMBER(sfp, from) \
((sfp)->hdr.i8count == 0 ? \
(xfs_intino_t)XFS_DIR2_SF_GET_INO4(*(from)) : \
(xfs_intino_t)XFS_DIR2_SF_GET_INO8(*(from)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_INUMBER)
void xfs_dir2_sf_put_inumber(xfs_dir2_sf_t *sfp, xfs_ino_t *from,
xfs_dir2_inou_t *to);
#define XFS_DIR2_SF_PUT_INUMBER(sfp,from,to) \
xfs_dir2_sf_put_inumber(sfp,from,to)
#else
#ifdef __LITTLE_ENDIAN
#define XFS_DIR2_SF_PUT_INUMBER(sfp,from,to) \
((sfp)->hdr.i8count == 0 ? \
(void)((to)->i4 = *(xfs_dir2_ino4_t *)((char *)(from))) : \
(void)((to)->i8 = *(xfs_dir2_ino8_t *)(from)))
#else
#define XFS_DIR2_SF_PUT_INUMBER(sfp,from,to) \
((sfp)->hdr.i8count == 0 ? \
(void)((to)->i4 = *(xfs_dir2_ino4_t *)(((char *)(from))+4)) : \
(void)((to)->i8 = *(xfs_dir2_ino8_t *)(from)))
#endif
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_OFFSET)
xfs_dir2_data_aoff_t xfs_dir2_sf_get_offset(xfs_dir2_sf_entry_t *sfep);
#define XFS_DIR2_SF_GET_OFFSET(sfep) xfs_dir2_sf_get_offset(sfep)
#else
#ifdef __LITTLE_ENDIAN
#define XFS_DIR2_SF_GET_OFFSET(sfep) \
(((sfep)->offset.i[1] << 8) | ((sfep)->offset.i[0]))
#else
#define XFS_DIR2_SF_GET_OFFSET(sfep) \
(((sfep)->offset.i[0] << 8) | ((sfep)->offset.i[1]))
#endif
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_OFFSET)
void xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep,
xfs_dir2_data_aoff_t off);
#define XFS_DIR2_SF_PUT_OFFSET(sfep,off) xfs_dir2_sf_put_offset(sfep,off)
#else
#ifdef __LITTLE_ENDIAN
#define XFS_DIR2_SF_PUT_OFFSET(sfep,off) \
((sfep)->offset.i[0] = ((off) >> 0) & 0xff, \
(sfep)->offset.i[1] = ((off) >> 8) & 0xff)
#else
#define XFS_DIR2_SF_PUT_OFFSET(sfep,off) \
((sfep)->offset.i[0] = ((off) >> 8) & 0xff, \
(sfep)->offset.i[1] = ((off) >> 0) & 0xff)
#endif
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_ENTSIZE_BYNAME)
int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_t *sfp, int len);
#define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len) \
xfs_dir2_sf_entsize_byname(sfp,len)
#else
#define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len) /* space a name uses */ \
((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (len) - \
((sfp)->hdr.i8count == 0) * \
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_ENTSIZE_BYENTRY)
int xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_t *sfp, xfs_dir2_sf_entry_t *sfep);
#define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep) \
xfs_dir2_sf_entsize_byentry(sfp,sfep)
#else
#define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep) /* space an entry uses */ \
((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (sfep)->namelen - \
((sfp)->hdr.i8count == 0) * \
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_FIRSTENTRY)
xfs_dir2_sf_entry_t *xfs_dir2_sf_firstentry(xfs_dir2_sf_t *sfp);
#define XFS_DIR2_SF_FIRSTENTRY(sfp) xfs_dir2_sf_firstentry(sfp)
#else
#define XFS_DIR2_SF_FIRSTENTRY(sfp) /* first entry in struct */ \
((xfs_dir2_sf_entry_t *) \
((char *)(sfp) + XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_NEXTENTRY)
xfs_dir2_sf_entry_t *xfs_dir2_sf_nextentry(xfs_dir2_sf_t *sfp,
xfs_dir2_sf_entry_t *sfep);
#define XFS_DIR2_SF_NEXTENTRY(sfp,sfep) xfs_dir2_sf_nextentry(sfp,sfep)
#else
#define XFS_DIR2_SF_NEXTENTRY(sfp,sfep) /* next entry in struct */ \
((xfs_dir2_sf_entry_t *) \
((char *)(sfep) + XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep)))
#endif
/*
* Functions.
*/
extern int
xfs_dir2_block_sfsize(struct xfs_inode *dp,
struct xfs_dir2_block *block,
xfs_dir2_sf_hdr_t *sfhp);
#if defined(XFS_REPAIR_SIM) || !defined(SIM)
extern int
xfs_dir2_block_to_sf(struct xfs_da_args *args, struct xfs_dabuf *bp,
int size, xfs_dir2_sf_hdr_t *sfhp);
#endif /* XFS_REPAIR_SIM || !SIM */
extern int
xfs_dir2_sf_addname(struct xfs_da_args *args);
extern int
xfs_dir2_sf_create(struct xfs_da_args *args, xfs_ino_t pino);
#ifndef SIM
extern int
xfs_dir2_sf_getdents(struct xfs_inode *dp, struct uio *uio, int *eofp,
struct dirent *dbp, xfs_dir2_put_t put);
#endif /* !SIM */
extern int
xfs_dir2_sf_lookup(struct xfs_da_args *args);
#if defined(XFS_REPAIR_SIM) || !defined(SIM)
extern int
xfs_dir2_sf_removename(struct xfs_da_args *args);
extern int
xfs_dir2_sf_replace(struct xfs_da_args *args);
#endif /* XFS_REPAIR_SIM || !SIM */
#endif /* !_FS_XFS_DIR2_SF_H */
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