aboutsummaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_dir2_sf.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/xfs/xfs_dir2_sf.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/xfs/xfs_dir2_sf.c')
-rw-r--r--fs/xfs/xfs_dir2_sf.c1317
1 files changed, 1317 insertions, 0 deletions
diff --git a/fs/xfs/xfs_dir2_sf.c b/fs/xfs/xfs_dir2_sf.c
new file mode 100644
index 00000000000..6bbc6167441
--- /dev/null
+++ b/fs/xfs/xfs_dir2_sf.c
@@ -0,0 +1,1317 @@
+/*
+ * Copyright (c) 2000-2003 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/
+ */
+
+/*
+ * xfs_dir2_sf.c
+ * Shortform directory implementation for v2 directories.
+ */
+
+#include "xfs.h"
+
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode_item.h"
+#include "xfs_inode.h"
+#include "xfs_da_btree.h"
+#include "xfs_dir_leaf.h"
+#include "xfs_error.h"
+#include "xfs_dir2_data.h"
+#include "xfs_dir2_leaf.h"
+#include "xfs_dir2_block.h"
+#include "xfs_dir2_trace.h"
+
+/*
+ * Prototypes for internal functions.
+ */
+static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
+ xfs_dir2_sf_entry_t *sfep,
+ xfs_dir2_data_aoff_t offset,
+ int new_isize);
+static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
+ int new_isize);
+static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
+ xfs_dir2_sf_entry_t **sfepp,
+ xfs_dir2_data_aoff_t *offsetp);
+#ifdef DEBUG
+static void xfs_dir2_sf_check(xfs_da_args_t *args);
+#else
+#define xfs_dir2_sf_check(args)
+#endif /* DEBUG */
+#if XFS_BIG_INUMS
+static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
+static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
+#endif /* XFS_BIG_INUMS */
+
+/*
+ * 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
+ * size is too big (but not accurate).
+ */
+int /* size for sf form */
+xfs_dir2_block_sfsize(
+ xfs_inode_t *dp, /* incore inode pointer */
+ xfs_dir2_block_t *block, /* block directory data */
+ xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */
+{
+ xfs_dir2_dataptr_t addr; /* data entry address */
+ xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
+ xfs_dir2_block_tail_t *btp; /* tail area of the block */
+ int count; /* shortform entry count */
+ xfs_dir2_data_entry_t *dep; /* data entry in the block */
+ int i; /* block entry index */
+ int i8count; /* count of big-inode entries */
+ int isdot; /* entry is "." */
+ int isdotdot; /* entry is ".." */
+ xfs_mount_t *mp; /* mount structure pointer */
+ int namelen; /* total name bytes */
+ xfs_ino_t parent; /* parent inode number */
+ int size=0; /* total computed size */
+
+ mp = dp->i_mount;
+
+ count = i8count = namelen = 0;
+ btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
+ blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+
+ /*
+ * Iterate over the block's data entries by using the leaf pointers.
+ */
+ for (i = 0; i < INT_GET(btp->count, ARCH_CONVERT); i++) {
+ if ((addr = INT_GET(blp[i].address, ARCH_CONVERT)) == XFS_DIR2_NULL_DATAPTR)
+ continue;
+ /*
+ * Calculate the pointer to the entry at hand.
+ */
+ dep = (xfs_dir2_data_entry_t *)
+ ((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, addr));
+ /*
+ * Detect . and .., so we can special-case them.
+ * . is not included in sf directories.
+ * .. is included by just the parent inode number.
+ */
+ isdot = dep->namelen == 1 && dep->name[0] == '.';
+ isdotdot =
+ dep->namelen == 2 &&
+ dep->name[0] == '.' && dep->name[1] == '.';
+#if XFS_BIG_INUMS
+ if (!isdot)
+ i8count += INT_GET(dep->inumber, ARCH_CONVERT) > XFS_DIR2_MAX_SHORT_INUM;
+#endif
+ if (!isdot && !isdotdot) {
+ count++;
+ namelen += dep->namelen;
+ } else if (isdotdot)
+ parent = INT_GET(dep->inumber, ARCH_CONVERT);
+ /*
+ * Calculate the new size, see if we should give up yet.
+ */
+ size = XFS_DIR2_SF_HDR_SIZE(i8count) + /* header */
+ count + /* namelen */
+ count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
+ namelen + /* name */
+ (i8count ? /* inumber */
+ (uint)sizeof(xfs_dir2_ino8_t) * count :
+ (uint)sizeof(xfs_dir2_ino4_t) * count);
+ if (size > XFS_IFORK_DSIZE(dp))
+ return size; /* size value is a failure */
+ }
+ /*
+ * Create the output header, if it worked.
+ */
+ sfhp->count = count;
+ sfhp->i8count = i8count;
+ XFS_DIR2_SF_PUT_INUMBER((xfs_dir2_sf_t *)sfhp, &parent, &sfhp->parent);
+ return size;
+}
+
+/*
+ * 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;
+}
+
+/*
+ * Add a name to a shortform directory.
+ * There are two algorithms, "easy" and "hard" which we decide on
+ * before changing anything.
+ * Convert to block form if necessary, if the new entry won't fit.
+ */
+int /* error */
+xfs_dir2_sf_addname(
+ xfs_da_args_t *args) /* operation arguments */
+{
+ int add_entsize; /* size of the new entry */
+ xfs_inode_t *dp; /* incore directory inode */
+ int error; /* error return value */
+ int incr_isize; /* total change in size */
+ int new_isize; /* di_size after adding name */
+ int objchange; /* changing to 8-byte inodes */
+ xfs_dir2_data_aoff_t offset; /* offset for new entry */
+ int old_isize; /* di_size before adding name */
+ int pick; /* which algorithm to use */
+ xfs_dir2_sf_t *sfp; /* shortform structure */
+ xfs_dir2_sf_entry_t *sfep; /* shortform entry */
+
+ xfs_dir2_trace_args("sf_addname", args);
+ ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
+ dp = args->dp;
+ ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
+ /*
+ * Make sure the shortform value has some of its header.
+ */
+ 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_t *)dp->i_df.if_u1.if_data;
+ ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+ /*
+ * Compute entry (and change in) size.
+ */
+ add_entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen);
+ incr_isize = add_entsize;
+ objchange = 0;
+#if XFS_BIG_INUMS
+ /*
+ * Do we have to change to 8 byte inodes?
+ */
+ if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
+ /*
+ * Yes, adjust the entry size and the total size.
+ */
+ add_entsize +=
+ (uint)sizeof(xfs_dir2_ino8_t) -
+ (uint)sizeof(xfs_dir2_ino4_t);
+ incr_isize +=
+ (sfp->hdr.count + 2) *
+ ((uint)sizeof(xfs_dir2_ino8_t) -
+ (uint)sizeof(xfs_dir2_ino4_t));
+ objchange = 1;
+ }
+#endif
+ old_isize = (int)dp->i_d.di_size;
+ new_isize = old_isize + incr_isize;
+ /*
+ * Won't fit as shortform any more (due to size),
+ * or the pick routine says it won't (due to offset values).
+ */
+ if (new_isize > XFS_IFORK_DSIZE(dp) ||
+ (pick =
+ xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
+ /*
+ * Just checking or no space reservation, it doesn't fit.
+ */
+ if (args->justcheck || args->total == 0)
+ return XFS_ERROR(ENOSPC);
+ /*
+ * Convert to block form then add the name.
+ */
+ error = xfs_dir2_sf_to_block(args);
+ if (error)
+ return error;
+ return xfs_dir2_block_addname(args);
+ }
+ /*
+ * Just checking, it fits.
+ */
+ if (args->justcheck)
+ return 0;
+ /*
+ * Do it the easy way - just add it at the end.
+ */
+ if (pick == 1)
+ xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
+ /*
+ * Do it the hard way - look for a place to insert the new entry.
+ * Convert to 8 byte inode numbers first if necessary.
+ */
+ else {
+ ASSERT(pick == 2);
+#if XFS_BIG_INUMS
+ if (objchange)
+ xfs_dir2_sf_toino8(args);
+#endif
+ xfs_dir2_sf_addname_hard(args, objchange, new_isize);
+ }
+ xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
+ return 0;
+}
+
+/*
+ * 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);
+}
+
+/*
+ * Add the new entry the "hard" way.
+ * The caller has already converted to 8 byte inode numbers if necessary,
+ * in which case we need to leave the i8count at 1.
+ * Find a hole that the new entry will fit into, and copy
+ * the first part of the entries, the new entry, and the last part of
+ * the entries.
+ */
+/* 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);
+}
+
+/*
+ * Decide if the new entry will fit at all.
+ * If it will fit, pick between adding the new entry to the end (easy)
+ * or somewhere else (hard).
+ * Return 0 (won't fit), 1 (easy), 2 (hard).
+ */
+/*ARGSUSED*/
+static int /* pick result */
+xfs_dir2_sf_addname_pick(
+ xfs_da_args_t *args, /* operation arguments */
+ int objchange, /* inode # size changes */
+ xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
+ xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
+{
+ xfs_inode_t *dp; /* incore directory inode */
+ int holefit; /* found hole it will fit in */
+ int i; /* entry number */
+ xfs_mount_t *mp; /* filesystem mount point */
+ xfs_dir2_data_aoff_t offset; /* data block offset */
+ xfs_dir2_sf_entry_t *sfep; /* shortform entry */
+ xfs_dir2_sf_t *sfp; /* shortform structure */
+ int size; /* entry's data size */
+ int used; /* data bytes used */
+
+ dp = args->dp;
+ mp = dp->i_mount;
+
+ sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
+ size = XFS_DIR2_DATA_ENTSIZE(args->namelen);
+ offset = XFS_DIR2_DATA_FIRST_OFFSET;
+ sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+ holefit = 0;
+ /*
+ * Loop over sf entries.
+ * Keep track of data offset and whether we've seen a place
+ * to insert the new entry.
+ */
+ for (i = 0; i < sfp->hdr.count; i++) {
+ if (!holefit)
+ holefit = offset + size <= XFS_DIR2_SF_GET_OFFSET(sfep);
+ offset = XFS_DIR2_SF_GET_OFFSET(sfep) +
+ XFS_DIR2_DATA_ENTSIZE(sfep->namelen);
+ sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
+ }
+ /*
+ * Calculate data bytes used excluding the new entry, if this
+ * was a data block (block form directory).
+ */
+ used = offset +
+ (sfp->hdr.count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
+ (uint)sizeof(xfs_dir2_block_tail_t);
+ /*
+ * If it won't fit in a block form then we can't insert it,
+ * we'll go back, convert to block, then try the insert and convert
+ * to leaf.
+ */
+ if (used + (holefit ? 0 : size) > mp->m_dirblksize)
+ return 0;
+ /*
+ * If changing the inode number size, do it the hard way.
+ */
+#if XFS_BIG_INUMS
+ if (objchange) {
+ return 2;
+ }
+#else
+ ASSERT(objchange == 0);
+#endif
+ /*
+ * If it won't fit at the end then do it the hard way (use the hole).
+ */
+ if (used + size > mp->m_dirblksize)
+ return 2;
+ /*
+ * Do it the easy way.
+ */
+ *sfepp = sfep;
+ *offsetp = offset;
+ return 1;
+}
+
+#ifdef DEBUG
+/*
+ * Check consistency of shortform directory, assert if bad.
+ */
+static void
+xfs_dir2_sf_check(
+ xfs_da_args_t *args) /* operation arguments */
+{
+ xfs_inode_t *dp; /* incore directory inode */
+ int i; /* entry number */
+ int i8count; /* number of big inode#s */
+ xfs_ino_t ino; /* entry inode number */
+ int offset; /* data offset */
+ xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
+ xfs_dir2_sf_t *sfp; /* shortform structure */
+
+ dp = args->dp;
+
+ sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
+ offset = XFS_DIR2_DATA_FIRST_OFFSET;
+ ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
+ i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
+
+ for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+ i < sfp->hdr.count;
+ i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+ ASSERT(XFS_DIR2_SF_GET_OFFSET(sfep) >= offset);
+ ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep));
+ i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
+ offset =
+ XFS_DIR2_SF_GET_OFFSET(sfep) +
+ XFS_DIR2_DATA_ENTSIZE(sfep->namelen);
+ }
+ ASSERT(i8count == sfp->hdr.i8count);
+ ASSERT(XFS_BIG_INUMS || i8count == 0);
+ ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
+ ASSERT(offset +
+ (sfp->hdr.count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
+ (uint)sizeof(xfs_dir2_block_tail_t) <=
+ dp->i_mount->m_dirblksize);
+}
+#endif /* DEBUG */
+
+/*
+ * Create a new (shortform) directory.
+ */
+int /* error, always 0 */
+xfs_dir2_sf_create(
+ xfs_da_args_t *args, /* operation arguments */
+ xfs_ino_t pino) /* parent inode number */
+{
+ xfs_inode_t *dp; /* incore directory inode */
+ int i8count; /* parent inode is an 8-byte number */
+ xfs_dir2_sf_t *sfp; /* shortform structure */
+ int size; /* directory size */
+
+ xfs_dir2_trace_args_i("sf_create", args, pino);
+ dp = args->dp;
+
+ ASSERT(dp != NULL);
+ ASSERT(dp->i_d.di_size == 0);
+ /*
+ * If it's currently a zero-length extent file,
+ * convert it to local format.
+ */
+ if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
+ dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
+ dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
+ xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
+ dp->i_df.if_flags |= XFS_IFINLINE;
+ }
+ ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
+ ASSERT(dp->i_df.if_bytes == 0);
+ i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
+ size = XFS_DIR2_SF_HDR_SIZE(i8count);
+ /*
+ * Make a buffer for the data.
+ */
+ xfs_idata_realloc(dp, size, XFS_DATA_FORK);
+ /*
+ * Fill in the header,
+ */
+ sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
+ sfp->hdr.i8count = i8count;
+ /*
+ * Now can put in the inode number, since i8count is set.
+ */
+ XFS_DIR2_SF_PUT_INUMBER(sfp, &pino, &sfp->hdr.parent);
+ sfp->hdr.count = 0;
+ dp->i_d.di_size = size;
+ xfs_dir2_sf_check(args);
+ xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
+ return 0;
+}
+
+int /* error */
+xfs_dir2_sf_getdents(
+ xfs_inode_t *dp, /* incore directory inode */
+ uio_t *uio, /* caller's buffer control */
+ int *eofp, /* eof reached? (out) */
+ xfs_dirent_t *dbp, /* caller's buffer */
+ xfs_dir2_put_t put) /* abi's formatting function */
+{
+ int error; /* error return value */
+ int i; /* shortform entry number */
+ xfs_mount_t *mp; /* filesystem mount point */
+ xfs_dir2_dataptr_t off; /* current entry's offset */
+ xfs_dir2_put_args_t p; /* arg package for put rtn */
+ xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
+ xfs_dir2_sf_t *sfp; /* shortform structure */
+ xfs_off_t dir_offset;
+
+ mp = dp->i_mount;
+
+ ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
+ /*
+ * Give up if the directory is way too short.
+ */
+ if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
+ ASSERT(XFS_FORCED_SHUTDOWN(mp));
+ return XFS_ERROR(EIO);
+ }
+
+ dir_offset = uio->uio_offset;
+
+ ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
+ ASSERT(dp->i_df.if_u1.if_data != NULL);
+
+ sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
+
+ ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+
+ /*
+ * If the block number in the offset is out of range, we're done.
+ */
+ if (XFS_DIR2_DATAPTR_TO_DB(mp, dir_offset) > mp->m_dirdatablk) {
+ *eofp = 1;
+ return 0;
+ }
+
+ /*
+ * Set up putargs structure.
+ */
+ p.dbp = dbp;
+ p.put = put;
+ p.uio = uio;
+ /*
+ * Put . entry unless we're starting past it.
+ */
+ if (dir_offset <=
+ XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+ XFS_DIR2_DATA_DOT_OFFSET)) {
+ p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, 0,
+ XFS_DIR2_DATA_DOTDOT_OFFSET);
+ p.ino = dp->i_ino;
+#if XFS_BIG_INUMS
+ p.ino += mp->m_inoadd;
+#endif
+ p.name = ".";
+ p.namelen = 1;
+
+ error = p.put(&p);
+
+ if (!p.done) {
+ uio->uio_offset =
+ XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+ XFS_DIR2_DATA_DOT_OFFSET);
+ return error;
+ }
+ }
+
+ /*
+ * Put .. entry unless we're starting past it.
+ */
+ if (dir_offset <=
+ XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+ XFS_DIR2_DATA_DOTDOT_OFFSET)) {
+ p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+ XFS_DIR2_DATA_FIRST_OFFSET);
+ p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
+#if XFS_BIG_INUMS
+ p.ino += mp->m_inoadd;
+#endif
+ p.name = "..";
+ p.namelen = 2;
+
+ error = p.put(&p);
+
+ if (!p.done) {
+ uio->uio_offset =
+ XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+ XFS_DIR2_DATA_DOTDOT_OFFSET);
+ return error;
+ }
+ }
+
+ /*
+ * Loop while there are more entries and put'ing works.
+ */
+ for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+ i < sfp->hdr.count;
+ i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+
+ off = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+ XFS_DIR2_SF_GET_OFFSET(sfep));
+
+ if (dir_offset > off)
+ continue;
+
+ p.namelen = sfep->namelen;
+
+ p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+ XFS_DIR2_SF_GET_OFFSET(sfep) +
+ XFS_DIR2_DATA_ENTSIZE(p.namelen));
+
+ p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep));
+#if XFS_BIG_INUMS
+ p.ino += mp->m_inoadd;
+#endif
+ p.name = (char *)sfep->name;
+
+ error = p.put(&p);
+
+ if (!p.done) {
+ uio->uio_offset = off;
+ return error;
+ }
+ }
+
+ /*
+ * They all fit.
+ */
+ *eofp = 1;
+
+ uio->uio_offset =
+ XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk + 1, 0);
+
+ return 0;
+}
+
+/*
+ * Lookup an entry in a shortform directory.
+ * Returns EEXIST if found, ENOENT if not found.
+ */
+int /* error */
+xfs_dir2_sf_lookup(
+ xfs_da_args_t *args) /* operation arguments */
+{
+ xfs_inode_t *dp; /* incore directory inode */
+ int i; /* entry index */
+ xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
+ xfs_dir2_sf_t *sfp; /* shortform structure */
+
+ xfs_dir2_trace_args("sf_lookup", args);
+ xfs_dir2_sf_check(args);
+ dp = args->dp;
+
+ ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
+ /*
+ * Bail out if the directory is way too short.
+ */
+ 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_t *)dp->i_df.if_u1.if_data;
+ ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+ /*
+ * Special case for .
+ */
+ if (args->namelen == 1 && args->name[0] == '.') {
+ args->inumber = dp->i_ino;
+ return XFS_ERROR(EEXIST);
+ }
+ /*
+ * Special case for ..
+ */
+ if (args->namelen == 2 &&
+ args->name[0] == '.' && args->name[1] == '.') {
+ args->inumber = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
+ return XFS_ERROR(EEXIST);
+ }
+ /*
+ * Loop over all the entries trying to match ours.
+ */
+ for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+ i < sfp->hdr.count;
+ i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+ if (sfep->namelen == args->namelen &&
+ sfep->name[0] == args->name[0] &&
+ memcmp(args->name, sfep->name, args->namelen) == 0) {
+ args->inumber =
+ XFS_DIR2_SF_GET_INUMBER(sfp,
+ XFS_DIR2_SF_INUMBERP(sfep));
+ return XFS_ERROR(EEXIST);
+ }
+ }
+ /*
+ * Didn't find it.
+ */
+ ASSERT(args->oknoent);
+ return XFS_ERROR(ENOENT);
+}
+
+/*
+ * 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_t *sfp; /* shortform structure */
+
+ xfs_dir2_trace_args("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_t *)dp->i_df.if_u1.if_data;
+ ASSERT(oldsize >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+ /*
+ * Loop over the old directory entries.
+ * Find the one we're deleting.
+ */
+ for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+ i < sfp->hdr.count;
+ i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+ if (sfep->namelen == args->namelen &&
+ sfep->name[0] == args->name[0] &&
+ memcmp(sfep->name, args->name, args->namelen) == 0) {
+ ASSERT(XFS_DIR2_SF_GET_INUMBER(sfp,
+ XFS_DIR2_SF_INUMBERP(sfep)) ==
+ args->inumber);
+ break;
+ }
+ }
+ /*
+ * Didn't find it.
+ */
+ if (i == sfp->hdr.count) {
+ return XFS_ERROR(ENOENT);
+ }
+ /*
+ * Calculate sizes.
+ */
+ byteoff = (int)((char *)sfep - (char *)sfp);
+ entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(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->hdr.count--;
+ dp->i_d.di_size = newsize;
+ /*
+ * Reallocate, making it smaller.
+ */
+ xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
+ sfp = (xfs_dir2_sf_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->hdr.i8count == 1)
+ xfs_dir2_sf_toino4(args);
+ else
+ sfp->hdr.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_t *sfp; /* shortform structure */
+
+ xfs_dir2_trace_args("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_t *)dp->i_df.if_u1.if_data;
+ ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.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->hdr.i8count == 0) {
+ int error; /* error return value */
+ int newsize; /* new inode size */
+
+ newsize =
+ dp->i_df.if_bytes +
+ (sfp->hdr.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_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_INUMBER(sfp, &sfp->hdr.parent);
+ ASSERT(args->inumber != ino);
+#endif
+ XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber, &sfp->hdr.parent);
+ }
+ /*
+ * Normal entry, look for the name.
+ */
+ else {
+ for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+ i < sfp->hdr.count;
+ i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+ if (sfep->namelen == args->namelen &&
+ sfep->name[0] == args->name[0] &&
+ memcmp(args->name, sfep->name, args->namelen) == 0) {
+#if XFS_BIG_INUMS || defined(DEBUG)
+ ino = XFS_DIR2_SF_GET_INUMBER(sfp,
+ XFS_DIR2_SF_INUMBERP(sfep));
+ ASSERT(args->inumber != ino);
+#endif
+ XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
+ XFS_DIR2_SF_INUMBERP(sfep));
+ break;
+ }
+ }
+ /*
+ * Didn't find it.
+ */
+ if (i == sfp->hdr.count) {
+ ASSERT(args->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->hdr.i8count == 1)
+ xfs_dir2_sf_toino4(args);
+ else
+ sfp->hdr.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->hdr.i8count != 0);
+ if (!i8elevated)
+ sfp->hdr.i8count++;
+ }
+#endif
+ xfs_dir2_sf_check(args);
+ xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
+ return 0;
+}
+
+#if XFS_BIG_INUMS
+/*
+ * Convert from 8-byte inode numbers to 4-byte inode numbers.
+ * The last 8-byte inode number is gone, but the count is still 1.
+ */
+static void
+xfs_dir2_sf_toino4(
+ xfs_da_args_t *args) /* operation arguments */
+{
+ char *buf; /* old dir's buffer */
+ xfs_inode_t *dp; /* incore directory inode */
+ int i; /* entry index */
+ xfs_ino_t ino; /* entry inode number */
+ int newsize; /* new inode size */
+ xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
+ xfs_dir2_sf_t *oldsfp; /* old sf directory */
+ int oldsize; /* old inode size */
+ xfs_dir2_sf_entry_t *sfep; /* new sf entry */
+ xfs_dir2_sf_t *sfp; /* new sf directory */
+
+ xfs_dir2_trace_args("sf_toino4", args);
+ dp = args->dp;
+
+ /*
+ * Copy the old directory to the buffer.
+ * Then nuke it from the inode, and add the new buffer to the inode.
+ * Don't want xfs_idata_realloc copying the data here.
+ */
+ oldsize = dp->i_df.if_bytes;
+ buf = kmem_alloc(oldsize, KM_SLEEP);
+ oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
+ ASSERT(oldsfp->hdr.i8count == 1);
+ memcpy(buf, oldsfp, oldsize);
+ /*
+ * Compute the new inode size.
+ */
+ newsize =
+ oldsize -
+ (oldsfp->hdr.count + 1) *
+ ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
+ xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
+ xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
+ /*
+ * Reset our pointers, the data has moved.
+ */
+ oldsfp = (xfs_dir2_sf_t *)buf;
+ sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
+ /*
+ * Fill in the new header.
+ */
+ sfp->hdr.count = oldsfp->hdr.count;
+ sfp->hdr.i8count = 0;
+ ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, &oldsfp->hdr.parent);
+ XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, &sfp->hdr.parent);
+ /*
+ * Copy the entries field by field.
+ */
+ for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp),
+ oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp);
+ i < sfp->hdr.count;
+ i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep),
+ oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) {
+ sfep->namelen = oldsfep->namelen;
+ sfep->offset = oldsfep->offset;
+ memcpy(sfep->name, oldsfep->name, sfep->namelen);
+ ino = XFS_DIR2_SF_GET_INUMBER(oldsfp,
+ XFS_DIR2_SF_INUMBERP(oldsfep));
+ XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep));
+ }
+ /*
+ * Clean up the inode.
+ */
+ kmem_free(buf, oldsize);
+ dp->i_d.di_size = newsize;
+ xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
+}
+
+/*
+ * Convert from 4-byte inode numbers to 8-byte inode numbers.
+ * The new 8-byte inode number is not there yet, we leave with the
+ * count 1 but no corresponding entry.
+ */
+static void
+xfs_dir2_sf_toino8(
+ xfs_da_args_t *args) /* operation arguments */
+{
+ char *buf; /* old dir's buffer */
+ xfs_inode_t *dp; /* incore directory inode */
+ int i; /* entry index */
+ xfs_ino_t ino; /* entry inode number */
+ int newsize; /* new inode size */
+ xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
+ xfs_dir2_sf_t *oldsfp; /* old sf directory */
+ int oldsize; /* old inode size */
+ xfs_dir2_sf_entry_t *sfep; /* new sf entry */
+ xfs_dir2_sf_t *sfp; /* new sf directory */
+
+ xfs_dir2_trace_args("sf_toino8", args);
+ dp = args->dp;
+
+ /*
+ * Copy the old directory to the buffer.
+ * Then nuke it from the inode, and add the new buffer to the inode.
+ * Don't want xfs_idata_realloc copying the data here.
+ */
+ oldsize = dp->i_df.if_bytes;
+ buf = kmem_alloc(oldsize, KM_SLEEP);
+ oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
+ ASSERT(oldsfp->hdr.i8count == 0);
+ memcpy(buf, oldsfp, oldsize);
+ /*
+ * Compute the new inode size.
+ */
+ newsize =
+ oldsize +
+ (oldsfp->hdr.count + 1) *
+ ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
+ xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
+ xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
+ /*
+ * Reset our pointers, the data has moved.
+ */
+ oldsfp = (xfs_dir2_sf_t *)buf;
+ sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
+ /*
+ * Fill in the new header.
+ */
+ sfp->hdr.count = oldsfp->hdr.count;
+ sfp->hdr.i8count = 1;
+ ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, &oldsfp->hdr.parent);
+ XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, &sfp->hdr.parent);
+ /*
+ * Copy the entries field by field.
+ */
+ for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp),
+ oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp);
+ i < sfp->hdr.count;
+ i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep),
+ oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) {
+ sfep->namelen = oldsfep->namelen;
+ sfep->offset = oldsfep->offset;
+ memcpy(sfep->name, oldsfep->name, sfep->namelen);
+ ino = XFS_DIR2_SF_GET_INUMBER(oldsfp,
+ XFS_DIR2_SF_INUMBERP(oldsfep));
+ XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep));
+ }
+ /*
+ * Clean up the inode.
+ */
+ kmem_free(buf, oldsize);
+ dp->i_d.di_size = newsize;
+ xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
+}
+#endif /* XFS_BIG_INUMS */