/*
* Add the new entry the "easy" way.
* This is copying the old directory and adding the new entry at the end.
* Since it's sorted by "offset" we need room after the last offset
* that's already there, and then room to convert to a block directory.
* This is already checked by the pick routine.
*/
static void
xfs_dir2_sf_addname_easy(
xfs_da_args_t *args, /* operation arguments */
xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
int new_isize) /* new directory size */
{
int byteoff; /* byte offset in sf dir */
xfs_inode_t *dp; /* incore directory inode */
xfs_dir2_sf_t *sfp; /* shortform structure */
dp = args->dp;
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
byteoff = (int)((char *)sfep - (char *)sfp);
/*
* Grow the in-inode space.
*/
xfs_idata_realloc(dp, XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen),
XFS_DATA_FORK);
/*
* Need to set up again due to realloc of the inode data.
*/
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
/*
* Fill in the new entry.
*/
sfep->namelen = args->namelen;
XFS_DIR2_SF_PUT_OFFSET(sfep, offset);
memcpy(sfep->name, args->name, sfep->namelen);
XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
XFS_DIR2_SF_INUMBERP(sfep));
/*
* Update the header and inode.
*/
sfp->hdr.count++;
#if XFS_BIG_INUMS
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
sfp->hdr.i8count++;
#endif
dp->i_d.di_size = new_isize;
xfs_dir2_sf_check(args);
}
void
xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep, xfs_dir2_data_aoff_t off)
{
XFS_DIR2_SF_PUT_OFFSET(sfep, off);
}
/* ARGSUSED */
static void
xfs_dir2_sf_addname_hard(
xfs_da_args_t *args, /* operation arguments */
int objchange, /* changing inode number size */
int new_isize) /* new directory size */
{
int add_datasize; /* data size need for new ent */
char *buf; /* buffer for old */
xfs_inode_t *dp; /* incore directory inode */
int eof; /* reached end of old dir */
int nbytes; /* temp for byte copies */
xfs_dir2_data_aoff_t new_offset; /* next offset value */
xfs_dir2_data_aoff_t offset; /* current offset value */
int old_isize; /* previous di_size */
xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
xfs_dir2_sf_t *oldsfp; /* original shortform dir */
xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
xfs_dir2_sf_t *sfp; /* new shortform dir */
/*
* Copy the old directory to the stack buffer.
*/
dp = args->dp;
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
old_isize = (int)dp->i_d.di_size;
buf = kmem_alloc(old_isize, KM_SLEEP);
oldsfp = (xfs_dir2_sf_t *)buf;
memcpy(oldsfp, sfp, old_isize);
/*
* Loop over the old directory finding the place we're going
* to insert the new entry.
* If it's going to end up at the end then oldsfep will point there.
*/
for (offset = XFS_DIR2_DATA_FIRST_OFFSET,
oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp),
add_datasize = XFS_DIR2_DATA_ENTSIZE(args->namelen),
eof = (char *)oldsfep == &buf[old_isize];
!eof;
offset = new_offset + XFS_DIR2_DATA_ENTSIZE(oldsfep->namelen),
oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep),
eof = (char *)oldsfep == &buf[old_isize]) {
new_offset = XFS_DIR2_SF_GET_OFFSET(oldsfep);
if (offset + add_datasize <= new_offset)
break;
}
/*
* Get rid of the old directory, then allocate space for
* the new one. We do this so xfs_idata_realloc won't copy
* the data.
*/
xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
/*
* Reset the pointer since the buffer was reallocated.
*/
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
/*
* Copy the first part of the directory, including the header.
*/
nbytes = (int)((char *)oldsfep - (char *)oldsfp);
memcpy(sfp, oldsfp, nbytes);
sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
/*
* Fill in the new entry, and update the header counts.
*/
sfep->namelen = args->namelen;
XFS_DIR2_SF_PUT_OFFSET(sfep, offset);
memcpy(sfep->name, args->name, sfep->namelen);
XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
XFS_DIR2_SF_INUMBERP(sfep));
sfp->hdr.count++;
#if XFS_BIG_INUMS
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
sfp->hdr.i8count++;
#endif
/*
* If there's more left to copy, do that.
*/
if (!eof) {
sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
memcpy(sfep, oldsfep, old_isize - nbytes);
}
kmem_free(buf, old_isize);
dp->i_d.di_size = new_isize;
xfs_dir2_sf_check(args);
}
/*
* Convert a block format directory to shortform.
* Caller has already checked that it will fit, and built us a header.
*/
int /* error */
xfs_dir2_block_to_sf(
xfs_da_args_t *args, /* operation arguments */
xfs_dabuf_t *bp, /* block buffer */
int size, /* shortform directory size */
xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
{
xfs_dir2_block_t *block; /* block structure */
xfs_dir2_block_tail_t *btp; /* block tail pointer */
xfs_dir2_data_entry_t *dep; /* data entry pointer */
xfs_inode_t *dp; /* incore directory inode */
xfs_dir2_data_unused_t *dup; /* unused data pointer */
char *endptr; /* end of data entries */
int error; /* error return value */
int logflags; /* inode logging flags */
xfs_mount_t *mp; /* filesystem mount point */
char *ptr; /* current data pointer */
xfs_dir2_sf_entry_t *sfep; /* shortform entry */
xfs_dir2_sf_t *sfp; /* shortform structure */
xfs_ino_t temp;
xfs_dir2_trace_args_sb("block_to_sf", args, size, bp);
dp = args->dp;
mp = dp->i_mount;
/*
* Make a copy of the block data, so we can shrink the inode
* and add local data.
*/
block = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
memcpy(block, bp->data, mp->m_dirblksize);
logflags = XFS_ILOG_CORE;
if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) {
ASSERT(error != ENOSPC);
goto out;
}
/*
* The buffer is now unconditionally gone, whether
* xfs_dir2_shrink_inode worked or not.
*
* Convert the inode to local format.
*/
dp->i_df.if_flags &= ~XFS_IFEXTENTS;
dp->i_df.if_flags |= XFS_IFINLINE;
dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
ASSERT(dp->i_df.if_bytes == 0);
xfs_idata_realloc(dp, size, XFS_DATA_FORK);
logflags |= XFS_ILOG_DDATA;
/*
* Copy the header into the newly allocate local space.
*/
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
memcpy(sfp, sfhp, XFS_DIR2_SF_HDR_SIZE(sfhp->i8count));
dp->i_d.di_size = size;
/*
* Set up to loop over the block's entries.
*/
btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
ptr = (char *)block->u;
endptr = (char *)XFS_DIR2_BLOCK_LEAF_P(btp);
sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
/*
* Loop over the active and unused entries.
* Stop when we reach the leaf/tail portion of the block.
*/
while (ptr < endptr) {
/*
* If it's unused, just skip over it.
*/
dup = (xfs_dir2_data_unused_t *)ptr;
if (INT_GET(dup->freetag, ARCH_CONVERT) == XFS_DIR2_DATA_FREE_TAG) {
ptr += INT_GET(dup->length, ARCH_CONVERT);
continue;
}
dep = (xfs_dir2_data_entry_t *)ptr;
/*
* Skip .
*/
if (dep->namelen == 1 && dep->name[0] == '.')
ASSERT(INT_GET(dep->inumber, ARCH_CONVERT) == dp->i_ino);
/*
* Skip .., but make sure the inode number is right.
*/
else if (dep->namelen == 2 &&
dep->name[0] == '.' && dep->name[1] == '.')
ASSERT(INT_GET(dep->inumber, ARCH_CONVERT) ==
XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent));
/*
* Normal entry, copy it into shortform.
*/
else {
sfep->namelen = dep->namelen;
XFS_DIR2_SF_PUT_OFFSET(sfep,
(xfs_dir2_data_aoff_t)
((char *)dep - (char *)block));
memcpy(sfep->name, dep->name, dep->namelen);
temp=INT_GET(dep->inumber, ARCH_CONVERT);
XFS_DIR2_SF_PUT_INUMBER(sfp, &temp,
XFS_DIR2_SF_INUMBERP(sfep));
sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
}
ptr += XFS_DIR2_DATA_ENTSIZE(dep->namelen);
}
ASSERT((char *)sfep - (char *)sfp == size);
xfs_dir2_sf_check(args);
out:
xfs_trans_log_inode(args->trans, dp, logflags);
kmem_free(block, mp->m_dirblksize);
return error;
}