diff options
Diffstat (limited to 'fs/xfs/xfs_dir2_sf.c')
| -rw-r--r-- | fs/xfs/xfs_dir2_sf.c | 151 |
1 files changed, 30 insertions, 121 deletions
diff --git a/fs/xfs/xfs_dir2_sf.c b/fs/xfs/xfs_dir2_sf.c index 73881c9f40d6..ec0d39b5fa12 100644 --- a/fs/xfs/xfs_dir2_sf.c +++ b/fs/xfs/xfs_dir2_sf.c @@ -57,89 +57,6 @@ static void xfs_dir2_sf_toino8(xfs_da_args_t *args); #endif /* XFS_BIG_INUMS */ /* - * Inode numbers in short-form directories can come in two versions, - * either 4 bytes or 8 bytes wide. These helpers deal with the - * two forms transparently by looking at the headers i8count field. - * - * For 64-bit inode number the most significant byte must be zero. - */ -static xfs_ino_t -xfs_dir2_sf_get_ino( - struct xfs_dir2_sf_hdr *hdr, - xfs_dir2_inou_t *from) -{ - if (hdr->i8count) - return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL; - else - return get_unaligned_be32(&from->i4.i); -} - -static void -xfs_dir2_sf_put_ino( - struct xfs_dir2_sf_hdr *hdr, - xfs_dir2_inou_t *to, - xfs_ino_t ino) -{ - ASSERT((ino & 0xff00000000000000ULL) == 0); - - if (hdr->i8count) - put_unaligned_be64(ino, &to->i8.i); - else - put_unaligned_be32(ino, &to->i4.i); -} - -xfs_ino_t -xfs_dir2_sf_get_parent_ino( - struct xfs_dir2_sf_hdr *hdr) -{ - return xfs_dir2_sf_get_ino(hdr, &hdr->parent); -} - -void -xfs_dir2_sf_put_parent_ino( - struct xfs_dir2_sf_hdr *hdr, - xfs_ino_t ino) -{ - xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino); -} - -/* - * In short-form directory entries the inode numbers are stored at variable - * offset behind the entry name. If the entry stores a filetype value, then it - * sits between the name and the inode number. Hence the inode numbers may only - * be accessed through the helpers below. - */ -static xfs_dir2_inou_t * -xfs_dir3_sfe_inop( - struct xfs_mount *mp, - struct xfs_dir2_sf_entry *sfep) -{ - __uint8_t *ptr = &sfep->name[sfep->namelen]; - if (xfs_sb_version_hasftype(&mp->m_sb)) - ptr++; - return (xfs_dir2_inou_t *)ptr; -} - -xfs_ino_t -xfs_dir3_sfe_get_ino( - struct xfs_mount *mp, - struct xfs_dir2_sf_hdr *hdr, - struct xfs_dir2_sf_entry *sfep) -{ - return xfs_dir2_sf_get_ino(hdr, xfs_dir3_sfe_inop(mp, sfep)); -} - -void -xfs_dir3_sfe_put_ino( - struct xfs_mount *mp, - struct xfs_dir2_sf_hdr *hdr, - struct xfs_dir2_sf_entry *sfep, - xfs_ino_t ino) -{ - xfs_dir2_sf_put_ino(hdr, xfs_dir3_sfe_inop(mp, sfep), ino); -} - -/* * Given a block directory (dp/block), calculate its size as a shortform (sf) * directory and a header for the sf directory, if it will fit it the * space currently present in the inode. If it won't fit, the output @@ -226,7 +143,7 @@ xfs_dir2_block_sfsize( */ sfhp->count = count; sfhp->i8count = i8count; - xfs_dir2_sf_put_parent_ino(sfhp, parent); + dp->d_ops->sf_put_parent_ino(sfhp, parent); return size; } @@ -321,7 +238,7 @@ xfs_dir2_block_to_sf( else if (dep->namelen == 2 && dep->name[0] == '.' && dep->name[1] == '.') ASSERT(be64_to_cpu(dep->inumber) == - xfs_dir2_sf_get_parent_ino(sfp)); + dp->d_ops->sf_get_parent_ino(sfp)); /* * Normal entry, copy it into shortform. */ @@ -331,9 +248,9 @@ xfs_dir2_block_to_sf( (xfs_dir2_data_aoff_t) ((char *)dep - (char *)hdr)); memcpy(sfep->name, dep->name, dep->namelen); - xfs_dir3_sfe_put_ino(mp, sfp, sfep, - be64_to_cpu(dep->inumber)); - xfs_dir3_sfe_put_ftype(mp, sfp, sfep, + dp->d_ops->sf_put_ino(sfp, sfep, + be64_to_cpu(dep->inumber)); + dp->d_ops->sf_put_ftype(sfep, xfs_dir3_dirent_get_ftype(mp, dep)); sfep = dp->d_ops->sf_nextentry(sfp, sfep); @@ -496,8 +413,8 @@ xfs_dir2_sf_addname_easy( sfep->namelen = args->namelen; xfs_dir2_sf_put_offset(sfep, offset); memcpy(sfep->name, args->name, sfep->namelen); - xfs_dir3_sfe_put_ino(dp->i_mount, sfp, sfep, args->inumber); - xfs_dir3_sfe_put_ftype(dp->i_mount, sfp, sfep, args->filetype); + dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); + dp->d_ops->sf_put_ftype(sfep, args->filetype); /* * Update the header and inode. @@ -591,8 +508,8 @@ xfs_dir2_sf_addname_hard( sfep->namelen = args->namelen; xfs_dir2_sf_put_offset(sfep, offset); memcpy(sfep->name, args->name, sfep->namelen); - xfs_dir3_sfe_put_ino(mp, sfp, sfep, args->inumber); - xfs_dir3_sfe_put_ftype(mp, sfp, sfep, args->filetype); + dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); + dp->d_ops->sf_put_ftype(sfep, args->filetype); sfp->count++; #if XFS_BIG_INUMS if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange) @@ -713,20 +630,19 @@ xfs_dir2_sf_check( sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; offset = xfs_dir3_data_first_offset(mp); - ino = xfs_dir2_sf_get_parent_ino(sfp); + ino = dp->d_ops->sf_get_parent_ino(sfp); i8count = ino > XFS_DIR2_MAX_SHORT_INUM; for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset); - ino = xfs_dir3_sfe_get_ino(mp, sfp, sfep); + ino = dp->d_ops->sf_get_ino(sfp, sfep); i8count += ino > XFS_DIR2_MAX_SHORT_INUM; offset = xfs_dir2_sf_get_offset(sfep) + xfs_dir3_data_entsize(mp, sfep->namelen); - ASSERT(xfs_dir3_sfe_get_ftype(mp, sfp, sfep) < - XFS_DIR3_FT_MAX); + ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX); } ASSERT(i8count == sfp->i8count); ASSERT(XFS_BIG_INUMS || i8count == 0); @@ -782,7 +698,7 @@ xfs_dir2_sf_create( /* * Now can put in the inode number, since i8count is set. */ - xfs_dir2_sf_put_parent_ino(sfp, pino); + dp->d_ops->sf_put_parent_ino(sfp, pino); sfp->count = 0; dp->i_d.di_size = size; xfs_dir2_sf_check(args); @@ -837,7 +753,7 @@ xfs_dir2_sf_lookup( */ if (args->namelen == 2 && args->name[0] == '.' && args->name[1] == '.') { - args->inumber = xfs_dir2_sf_get_parent_ino(sfp); + args->inumber = dp->d_ops->sf_get_parent_ino(sfp); args->cmpresult = XFS_CMP_EXACT; args->filetype = XFS_DIR3_FT_DIR; return XFS_ERROR(EEXIST); @@ -857,10 +773,8 @@ xfs_dir2_sf_lookup( sfep->namelen); if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { args->cmpresult = cmp; - args->inumber = xfs_dir3_sfe_get_ino(dp->i_mount, - sfp, sfep); - args->filetype = xfs_dir3_sfe_get_ftype(dp->i_mount, - sfp, sfep); + args->inumber = dp->d_ops->sf_get_ino(sfp, sfep); + args->filetype = dp->d_ops->sf_get_ftype(sfep); if (cmp == XFS_CMP_EXACT) return XFS_ERROR(EEXIST); ci_sfep = sfep; @@ -919,7 +833,7 @@ xfs_dir2_sf_removename( i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) { if (xfs_da_compname(args, sfep->name, sfep->namelen) == XFS_CMP_EXACT) { - ASSERT(xfs_dir3_sfe_get_ino(dp->i_mount, sfp, sfep) == + ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) == args->inumber); break; } @@ -1040,10 +954,10 @@ xfs_dir2_sf_replace( if (args->namelen == 2 && args->name[0] == '.' && args->name[1] == '.') { #if XFS_BIG_INUMS || defined(DEBUG) - ino = xfs_dir2_sf_get_parent_ino(sfp); + ino = dp->d_ops->sf_get_parent_ino(sfp); ASSERT(args->inumber != ino); #endif - xfs_dir2_sf_put_parent_ino(sfp, args->inumber); + dp->d_ops->sf_put_parent_ino(sfp, args->inumber); } /* * Normal entry, look for the name. @@ -1054,14 +968,11 @@ xfs_dir2_sf_replace( if (xfs_da_compname(args, sfep->name, sfep->namelen) == XFS_CMP_EXACT) { #if XFS_BIG_INUMS || defined(DEBUG) - ino = xfs_dir3_sfe_get_ino(dp->i_mount, - sfp, sfep); + ino = dp->d_ops->sf_get_ino(sfp, sfep); ASSERT(args->inumber != ino); #endif - xfs_dir3_sfe_put_ino(dp->i_mount, sfp, sfep, - args->inumber); - xfs_dir3_sfe_put_ftype(dp->i_mount, sfp, sfep, - args->filetype); + dp->d_ops->sf_put_ino(sfp, sfep, args->inumber); + dp->d_ops->sf_put_ftype(sfep, args->filetype); break; } } @@ -1164,7 +1075,7 @@ xfs_dir2_sf_toino4( */ sfp->count = oldsfp->count; sfp->i8count = 0; - xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); + dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); /* * Copy the entries field by field. */ @@ -1176,10 +1087,9 @@ xfs_dir2_sf_toino4( sfep->namelen = oldsfep->namelen; sfep->offset = oldsfep->offset; memcpy(sfep->name, oldsfep->name, sfep->namelen); - xfs_dir3_sfe_put_ino(mp, sfp, sfep, - xfs_dir3_sfe_get_ino(mp, oldsfp, oldsfep)); - xfs_dir3_sfe_put_ftype(mp, sfp, sfep, - xfs_dir3_sfe_get_ftype(mp, oldsfp, oldsfep)); + dp->d_ops->sf_put_ino(sfp, sfep, + dp->d_ops->sf_get_ino(oldsfp, oldsfep)); + dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); } /* * Clean up the inode. @@ -1243,7 +1153,7 @@ xfs_dir2_sf_toino8( */ sfp->count = oldsfp->count; sfp->i8count = 1; - xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp)); + dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp)); /* * Copy the entries field by field. */ @@ -1255,10 +1165,9 @@ xfs_dir2_sf_toino8( sfep->namelen = oldsfep->namelen; sfep->offset = oldsfep->offset; memcpy(sfep->name, oldsfep->name, sfep->namelen); - xfs_dir3_sfe_put_ino(mp, sfp, sfep, - xfs_dir3_sfe_get_ino(mp, oldsfp, oldsfep)); - xfs_dir3_sfe_put_ftype(mp, sfp, sfep, - xfs_dir3_sfe_get_ftype(mp, oldsfp, oldsfep)); + dp->d_ops->sf_put_ino(sfp, sfep, + dp->d_ops->sf_get_ino(oldsfp, oldsfep)); + dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep)); } /* * Clean up the inode. |