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- /*
- * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
- */
- #ifndef __XFS_DIR2_SF_H__
- #define __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 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;
-
- #define XFS_DIR2_SF_GET_INO8_ARCH(di,arch) \
- (xfs_ino_t)(DIRINO_GET_ARCH(&di,arch))
- #define XFS_DIR2_SF_GET_INO8(di) \
- XFS_DIR2_SF_GET_INO8_ARCH(di,ARCH_NOCONVERT)
-
- /*
- * 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;
- #define XFS_DIR2_SF_GET_INO4_ARCH(di,arch) \
- (xfs_ino_t)(DIRINO4_GET_ARCH(&di,arch))
- #define XFS_DIR2_SF_GET_INO4(di) \
- XFS_DIR2_SF_GET_INO4_ARCH(di,ARCH_NOCONVERT)
-
- 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 memcpy'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_arch(xfs_dir2_sf_t *sfp, xfs_dir2_inou_t *from,
- xfs_arch_t arch);
- #define XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, from, arch) \
- xfs_dir2_sf_get_inumber_arch(sfp, from, arch)
-
- #else
- #define XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, from, arch) \
- ((sfp)->hdr.i8count == 0 ? \
- (xfs_intino_t)XFS_DIR2_SF_GET_INO4_ARCH(*(from), arch) : \
- (xfs_intino_t)XFS_DIR2_SF_GET_INO8_ARCH(*(from), arch))
- #endif
-
- #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_INUMBER)
- void xfs_dir2_sf_put_inumber_arch(xfs_dir2_sf_t *sfp, xfs_ino_t *from,
- xfs_dir2_inou_t *to, xfs_arch_t arch);
- #define XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp,from,to,arch) \
- xfs_dir2_sf_put_inumber_arch(sfp,from,to,arch)
- #else
- #define XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp,from,to,arch) \
- if ((sfp)->hdr.i8count == 0) { \
- DIRINO4_COPY_ARCH(from,to,arch); \
- } else { \
- DIRINO_COPY_ARCH(from,to,arch); \
- }
- #endif
-
- #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_OFFSET)
- xfs_dir2_data_aoff_t xfs_dir2_sf_get_offset_arch(xfs_dir2_sf_entry_t *sfep,
- xfs_arch_t arch);
- xfs_dir2_data_aoff_t xfs_dir2_sf_get_offset(xfs_dir2_sf_entry_t *sfep);
- #define XFS_DIR2_SF_GET_OFFSET_ARCH(sfep,arch) \
- xfs_dir2_sf_get_offset_arch(sfep,arch)
- #else
- #define XFS_DIR2_SF_GET_OFFSET_ARCH(sfep,arch) \
- INT_GET_UNALIGNED_16_ARCH(&(sfep)->offset.i,arch)
- #endif
-
- #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_OFFSET)
- void xfs_dir2_sf_put_offset_arch(xfs_dir2_sf_entry_t *sfep,
- xfs_dir2_data_aoff_t off, xfs_arch_t arch);
- #define XFS_DIR2_SF_PUT_OFFSET_ARCH(sfep,off,arch) \
- xfs_dir2_sf_put_offset_arch(sfep,off,arch)
- #else
- #define XFS_DIR2_SF_PUT_OFFSET_ARCH(sfep,off,arch) \
- INT_SET_UNALIGNED_16_ARCH(&(sfep)->offset.i,off,arch)
- #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);
-
- extern int
- xfs_dir2_block_to_sf(struct xfs_da_args *args, struct xfs_dabuf *bp,
- int size, xfs_dir2_sf_hdr_t *sfhp);
-
- 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);
-
- extern int
- xfs_dir2_sf_getdents(struct xfs_inode *dp, struct uio *uio, int *eofp,
- struct xfs_dirent *dbp, xfs_dir2_put_t put);
-
- extern int
- xfs_dir2_sf_lookup(struct xfs_da_args *args);
-
- extern int
- xfs_dir2_sf_removename(struct xfs_da_args *args);
-
- extern int
- xfs_dir2_sf_replace(struct xfs_da_args *args);
-
- #endif /* __XFS_DIR2_SF_H__ */
-