/* * Remove an entry from a shortform directory. */ int /* error */ xfs_dir2_sf_removename( xfs_da_args_t *args) { int byteoff; /* offset of removed entry */ xfs_inode_t *dp; /* incore directory inode */ int entsize; /* this entry's size */ int i; /* shortform entry index */ int newsize; /* new inode size */ int oldsize; /* old inode size */ xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ trace_xfs_dir2_sf_removename(args); dp = args->dp; ASSERT(dp->i_df.if_flags & XFS_IFINLINE); oldsize = (int)dp->i_d.di_size; /* * Bail out if the directory is way too short. */ if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); return XFS_ERROR(EIO); } ASSERT(dp->i_df.if_bytes == oldsize); ASSERT(dp->i_df.if_u1.if_data != NULL); sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); /* * Loop over the old directory entries. * Find the one we're deleting. */ for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { if (xfs_da_compname(args, sfep->name, sfep->namelen) == XFS_CMP_EXACT) { ASSERT(xfs_dir2_sfe_get_ino(sfp, sfep) == args->inumber); break; } } /* * Didn't find it. */ if (i == sfp->count) return XFS_ERROR(ENOENT); /* * Calculate sizes. */ byteoff = (int)((char *)sfep - (char *)sfp); entsize = xfs_dir2_sf_entsize(sfp, args->namelen); newsize = oldsize - entsize; /* * Copy the part if any after the removed entry, sliding it down. */ if (byteoff + entsize < oldsize) memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, oldsize - (byteoff + entsize)); /* * Fix up the header and file size. */ sfp->count--; dp->i_d.di_size = newsize; /* * Reallocate, making it smaller. */ xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; #if XFS_BIG_INUMS /* * Are we changing inode number size? */ if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { if (sfp->i8count == 1) xfs_dir2_sf_toino4(args); else sfp->i8count--; } #endif xfs_dir2_sf_check(args); xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); return 0; }
int /* */ xfs_dir2_sf_removename( xfs_da_args_t *args) { int byteoff; /* */ xfs_inode_t *dp; /* */ int entsize; /* */ int i; /* */ int newsize; /* */ int oldsize; /* */ xfs_dir2_sf_entry_t *sfep; /* */ xfs_dir2_sf_hdr_t *sfp; /* */ trace_xfs_dir2_sf_removename(args); dp = args->dp; ASSERT(dp->i_df.if_flags & XFS_IFINLINE); oldsize = (int)dp->i_d.di_size; /* */ if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) { ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); return XFS_ERROR(EIO); } ASSERT(dp->i_df.if_bytes == oldsize); ASSERT(dp->i_df.if_u1.if_data != NULL); sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count)); /* */ for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { if (xfs_da_compname(args, sfep->name, sfep->namelen) == XFS_CMP_EXACT) { ASSERT(xfs_dir2_sfe_get_ino(sfp, sfep) == args->inumber); break; } } /* */ if (i == sfp->count) return XFS_ERROR(ENOENT); /* */ byteoff = (int)((char *)sfep - (char *)sfp); entsize = xfs_dir2_sf_entsize(sfp, args->namelen); newsize = oldsize - entsize; /* */ if (byteoff + entsize < oldsize) memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize, oldsize - (byteoff + entsize)); /* */ sfp->count--; dp->i_d.di_size = newsize; /* */ xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK); sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; #if XFS_BIG_INUMS /* */ if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) { if (sfp->i8count == 1) xfs_dir2_sf_toino4(args); else sfp->i8count--; } #endif xfs_dir2_sf_check(args); xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA); return 0; }
/* * Replace the inode number of an entry in a shortform directory. */ int /* error */ xfs_dir2_sf_replace( xfs_da_args_t *args) /* operation arguments */ { xfs_inode_t *dp; /* incore directory inode */ int i; /* entry index */ #if XFS_BIG_INUMS || defined(DEBUG) xfs_ino_t ino=0; /* entry old inode number */ #endif #if XFS_BIG_INUMS int i8elevated; /* sf_toino8 set i8count=1 */ #endif xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ trace_xfs_dir2_sf_replace(args); dp = args->dp; ASSERT(dp->i_df.if_flags & XFS_IFINLINE); /* * Bail out if the shortform directory is way too small. */ if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); return XFS_ERROR(EIO); } ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); ASSERT(dp->i_df.if_u1.if_data != NULL); sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); #if XFS_BIG_INUMS /* * New inode number is large, and need to convert to 8-byte inodes. */ if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { int error; /* error return value */ int newsize; /* new inode size */ newsize = dp->i_df.if_bytes + (sfp->count + 1) * ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); /* * Won't fit as shortform, convert to block then do replace. */ if (newsize > XFS_IFORK_DSIZE(dp)) { error = xfs_dir2_sf_to_block(args); if (error) { return error; } return xfs_dir2_block_replace(args); } /* * Still fits, convert to 8-byte now. */ xfs_dir2_sf_toino8(args); i8elevated = 1; sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; } else i8elevated = 0; #endif ASSERT(args->namelen != 1 || args->name[0] != '.'); /* * Replace ..'s entry. */ if (args->namelen == 2 && args->name[0] == '.' && args->name[1] == '.') { #if XFS_BIG_INUMS || defined(DEBUG) ino = xfs_dir2_sf_get_parent_ino(sfp); ASSERT(args->inumber != ino); #endif xfs_dir2_sf_put_parent_ino(sfp, args->inumber); } /* * Normal entry, look for the name. */ else { for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { if (xfs_da_compname(args, sfep->name, sfep->namelen) == XFS_CMP_EXACT) { #if XFS_BIG_INUMS || defined(DEBUG) ino = xfs_dir2_sfe_get_ino(sfp, sfep); ASSERT(args->inumber != ino); #endif xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber); break; } } /* * Didn't find it. */ if (i == sfp->count) { ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); #if XFS_BIG_INUMS if (i8elevated) xfs_dir2_sf_toino4(args); #endif return XFS_ERROR(ENOENT); } } #if XFS_BIG_INUMS /* * See if the old number was large, the new number is small. */ if (ino > XFS_DIR2_MAX_SHORT_INUM && args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { /* * And the old count was one, so need to convert to small. */ if (sfp->i8count == 1) xfs_dir2_sf_toino4(args); else sfp->i8count--; } /* * See if the old number was small, the new number is large. */ if (ino <= XFS_DIR2_MAX_SHORT_INUM && args->inumber > XFS_DIR2_MAX_SHORT_INUM) { /* * add to the i8count unless we just converted to 8-byte * inodes (which does an implied i8count = 1) */ ASSERT(sfp->i8count != 0); if (!i8elevated) sfp->i8count++; } #endif xfs_dir2_sf_check(args); xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); return 0; }
int /* */ xfs_dir2_sf_replace( xfs_da_args_t *args) /* */ { xfs_inode_t *dp; /* */ int i; /* */ #if XFS_BIG_INUMS || defined(DEBUG) xfs_ino_t ino=0; /* */ #endif #if XFS_BIG_INUMS int i8elevated; /* */ #endif xfs_dir2_sf_entry_t *sfep; /* */ xfs_dir2_sf_hdr_t *sfp; /* */ trace_xfs_dir2_sf_replace(args); dp = args->dp; ASSERT(dp->i_df.if_flags & XFS_IFINLINE); /* */ if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); return XFS_ERROR(EIO); } ASSERT(dp->i_df.if_bytes == dp->i_d.di_size); ASSERT(dp->i_df.if_u1.if_data != NULL); sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count)); #if XFS_BIG_INUMS /* */ if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) { int error; /* */ int newsize; /* */ newsize = dp->i_df.if_bytes + (sfp->count + 1) * ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)); /* */ if (newsize > XFS_IFORK_DSIZE(dp)) { error = xfs_dir2_sf_to_block(args); if (error) { return error; } return xfs_dir2_block_replace(args); } /* */ xfs_dir2_sf_toino8(args); i8elevated = 1; sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; } else i8elevated = 0; #endif ASSERT(args->namelen != 1 || args->name[0] != '.'); /* */ if (args->namelen == 2 && args->name[0] == '.' && args->name[1] == '.') { #if XFS_BIG_INUMS || defined(DEBUG) ino = xfs_dir2_sf_get_parent_ino(sfp); ASSERT(args->inumber != ino); #endif xfs_dir2_sf_put_parent_ino(sfp, args->inumber); } /* */ else { for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count; i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) { if (xfs_da_compname(args, sfep->name, sfep->namelen) == XFS_CMP_EXACT) { #if XFS_BIG_INUMS || defined(DEBUG) ino = xfs_dir2_sfe_get_ino(sfp, sfep); ASSERT(args->inumber != ino); #endif xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber); break; } } /* */ if (i == sfp->count) { ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); #if XFS_BIG_INUMS if (i8elevated) xfs_dir2_sf_toino4(args); #endif return XFS_ERROR(ENOENT); } } #if XFS_BIG_INUMS /* */ if (ino > XFS_DIR2_MAX_SHORT_INUM && args->inumber <= XFS_DIR2_MAX_SHORT_INUM) { /* */ if (sfp->i8count == 1) xfs_dir2_sf_toino4(args); else sfp->i8count--; } /* */ if (ino <= XFS_DIR2_MAX_SHORT_INUM && args->inumber > XFS_DIR2_MAX_SHORT_INUM) { /* */ ASSERT(sfp->i8count != 0); if (!i8elevated) sfp->i8count++; } #endif xfs_dir2_sf_check(args); xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA); return 0; }