summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_dir2_sf.c
diff options
context:
space:
mode:
authorDave Chinner <dchinner@redhat.com>2014-06-25 06:57:53 +0200
committerDave Chinner <david@fromorbit.com>2014-06-25 06:57:53 +0200
commit30f712c9dd69348aa51351d5cb6d366bf4fae31d (patch)
tree9b246ca3986b784d8f9f6841466dfd4c90909e47 /fs/xfs/xfs_dir2_sf.c
parentlibxfs: move header files (diff)
downloadlinux-30f712c9dd69348aa51351d5cb6d366bf4fae31d.tar.xz
linux-30f712c9dd69348aa51351d5cb6d366bf4fae31d.zip
libxfs: move source files
Move all the source files that are shared with userspace into libxfs/. This is done as one big chunk simpy to get it done quickly Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_dir2_sf.c')
-rw-r--r--fs/xfs/xfs_dir2_sf.c1184
1 files changed, 0 insertions, 1184 deletions
diff --git a/fs/xfs/xfs_dir2_sf.c b/fs/xfs/xfs_dir2_sf.c
deleted file mode 100644
index ab3563b87995..000000000000
--- a/fs/xfs/xfs_dir2_sf.c
+++ /dev/null
@@ -1,1184 +0,0 @@
-/*
- * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms 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. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_format.h"
-#include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
-#include "xfs_inode.h"
-#include "xfs_trans.h"
-#include "xfs_inode_item.h"
-#include "xfs_error.h"
-#include "xfs_dir2.h"
-#include "xfs_dir2_priv.h"
-#include "xfs_trace.h"
-#include "xfs_dinode.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_data_hdr_t *hdr, /* 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 = 0; /* parent inode number */
- int size=0; /* total computed size */
- int has_ftype;
- struct xfs_da_geometry *geo;
-
- mp = dp->i_mount;
- geo = mp->m_dir_geo;
-
- /*
- * if there is a filetype field, add the extra byte to the namelen
- * for each entry that we see.
- */
- has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0;
-
- count = i8count = namelen = 0;
- btp = xfs_dir2_block_tail_p(geo, hdr);
- blp = xfs_dir2_block_leaf_p(btp);
-
- /*
- * Iterate over the block's data entries by using the leaf pointers.
- */
- for (i = 0; i < be32_to_cpu(btp->count); i++) {
- if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR)
- continue;
- /*
- * Calculate the pointer to the entry at hand.
- */
- dep = (xfs_dir2_data_entry_t *)((char *)hdr +
- xfs_dir2_dataptr_to_off(geo, 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 += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
-#endif
- /* take into account the file type field */
- if (!isdot && !isdotdot) {
- count++;
- namelen += dep->namelen + has_ftype;
- } else if (isdotdot)
- parent = be64_to_cpu(dep->inumber);
- /*
- * 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;
- dp->d_ops->sf_put_parent_ino(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 */
- struct xfs_buf *bp,
- int size, /* shortform directory size */
- xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
-{
- xfs_dir2_data_hdr_t *hdr; /* block header */
- 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_hdr_t *sfp; /* shortform directory header */
- xfs_dir2_sf_hdr_t *dst; /* temporary data buffer */
-
- trace_xfs_dir2_block_to_sf(args);
-
- dp = args->dp;
- mp = dp->i_mount;
-
- /*
- * allocate a temporary destination buffer the size of the inode
- * to format the data into. Once we have formatted the data, we
- * can free the block and copy the formatted data into the inode literal
- * area.
- */
- dst = kmem_alloc(mp->m_sb.sb_inodesize, KM_SLEEP);
- hdr = bp->b_addr;
-
- /*
- * Copy the header into the newly allocate local space.
- */
- sfp = (xfs_dir2_sf_hdr_t *)dst;
- memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
-
- /*
- * Set up to loop over the block's entries.
- */
- btp = xfs_dir2_block_tail_p(args->geo, hdr);
- ptr = (char *)dp->d_ops->data_entry_p(hdr);
- 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 (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
- ptr += be16_to_cpu(dup->length);
- continue;
- }
- dep = (xfs_dir2_data_entry_t *)ptr;
- /*
- * Skip .
- */
- if (dep->namelen == 1 && dep->name[0] == '.')
- ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
- /*
- * Skip .., but make sure the inode number is right.
- */
- else if (dep->namelen == 2 &&
- dep->name[0] == '.' && dep->name[1] == '.')
- ASSERT(be64_to_cpu(dep->inumber) ==
- dp->d_ops->sf_get_parent_ino(sfp));
- /*
- * 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 *)hdr));
- memcpy(sfep->name, dep->name, dep->namelen);
- dp->d_ops->sf_put_ino(sfp, sfep,
- be64_to_cpu(dep->inumber));
- dp->d_ops->sf_put_ftype(sfep,
- dp->d_ops->data_get_ftype(dep));
-
- sfep = dp->d_ops->sf_nextentry(sfp, sfep);
- }
- ptr += dp->d_ops->data_entsize(dep->namelen);
- }
- ASSERT((char *)sfep - (char *)sfp == size);
-
- /* now we are done with the block, we can shrink the inode */
- logflags = XFS_ILOG_CORE;
- error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp);
- if (error) {
- 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 and copy the data in.
- */
- 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;
- memcpy(dp->i_df.if_u1.if_data, dst, size);
- dp->i_d.di_size = size;
- xfs_dir2_sf_check(args);
-out:
- xfs_trans_log_inode(args->trans, dp, logflags);
- kmem_free(dst);
- 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 */
-{
- 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 = 0; /* offset for new entry */
- int pick; /* which algorithm to use */
- xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
- xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
-
- trace_xfs_dir2_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 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));
- /*
- * Compute entry (and change in) size.
- */
- incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen);
- objchange = 0;
-#if XFS_BIG_INUMS
- /*
- * Do we have to change to 8 byte inodes?
- */
- if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
- /*
- * Yes, adjust the inode size. old count + (parent + new)
- */
- incr_isize +=
- (sfp->count + 2) *
- ((uint)sizeof(xfs_dir2_ino8_t) -
- (uint)sizeof(xfs_dir2_ino4_t));
- objchange = 1;
- }
-#endif
- new_isize = (int)dp->i_d.di_size + 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->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
- return 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->op_flags & XFS_DA_OP_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_hdr_t *sfp; /* shortform structure */
-
- dp = args->dp;
-
- sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
- byteoff = (int)((char *)sfep - (char *)sfp);
- /*
- * Grow the in-inode space.
- */
- xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen),
- XFS_DATA_FORK);
- /*
- * Need to set up again due to realloc of the inode data.
- */
- sfp = (xfs_dir2_sf_hdr_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);
- dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
- dp->d_ops->sf_put_ftype(sfep, args->filetype);
-
- /*
- * Update the header and inode.
- */
- sfp->count++;
-#if XFS_BIG_INUMS
- if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
- sfp->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_hdr_t *oldsfp; /* original shortform dir */
- xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
- xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */
- struct xfs_mount *mp;
-
- /*
- * Copy the old directory to the stack buffer.
- */
- dp = args->dp;
- mp = dp->i_mount;
-
- sfp = (xfs_dir2_sf_hdr_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_hdr_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 = dp->d_ops->data_first_offset,
- oldsfep = xfs_dir2_sf_firstentry(oldsfp),
- add_datasize = dp->d_ops->data_entsize(args->namelen),
- eof = (char *)oldsfep == &buf[old_isize];
- !eof;
- offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen),
- oldsfep = dp->d_ops->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_hdr_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);
- 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)
- sfp->i8count++;
-#endif
- /*
- * If there's more left to copy, do that.
- */
- if (!eof) {
- sfep = dp->d_ops->sf_nextentry(sfp, sfep);
- memcpy(sfep, oldsfep, old_isize - nbytes);
- }
- kmem_free(buf);
- 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_hdr_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_hdr_t *)dp->i_df.if_u1.if_data;
- size = dp->d_ops->data_entsize(args->namelen);
- offset = dp->d_ops->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->count; i++) {
- if (!holefit)
- holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
- offset = xfs_dir2_sf_get_offset(sfep) +
- dp->d_ops->data_entsize(sfep->namelen);
- sfep = dp->d_ops->sf_nextentry(sfp, sfep);
- }
- /*
- * Calculate data bytes used excluding the new entry, if this
- * was a data block (block form directory).
- */
- used = offset +
- (sfp->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) > args->geo->blksize)
- 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 > args->geo->blksize)
- 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_hdr_t *sfp; /* shortform structure */
- struct xfs_mount *mp;
-
- dp = args->dp;
- mp = dp->i_mount;
-
- sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
- offset = dp->d_ops->data_first_offset;
- 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 = dp->d_ops->sf_get_ino(sfp, sfep);
- i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
- offset =
- xfs_dir2_sf_get_offset(sfep) +
- dp->d_ops->data_entsize(sfep->namelen);
- ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX);
- }
- ASSERT(i8count == sfp->i8count);
- ASSERT(XFS_BIG_INUMS || i8count == 0);
- ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
- ASSERT(offset +
- (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
- (uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize);
-}
-#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_hdr_t *sfp; /* shortform structure */
- int size; /* directory size */
-
- trace_xfs_dir2_sf_create(args);
-
- 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_hdr_t *)dp->i_df.if_u1.if_data;
- sfp->i8count = i8count;
- /*
- * Now can put in the inode number, since i8count is set.
- */
- dp->d_ops->sf_put_parent_ino(sfp, pino);
- sfp->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;
-}
-
-/*
- * 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 */
- int error;
- xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
- xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
- enum xfs_dacmp cmp; /* comparison result */
- xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
-
- trace_xfs_dir2_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 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));
- /*
- * Special case for .
- */
- if (args->namelen == 1 && args->name[0] == '.') {
- args->inumber = dp->i_ino;
- args->cmpresult = XFS_CMP_EXACT;
- args->filetype = XFS_DIR3_FT_DIR;
- return EEXIST;
- }
- /*
- * Special case for ..
- */
- if (args->namelen == 2 &&
- args->name[0] == '.' && args->name[1] == '.') {
- args->inumber = dp->d_ops->sf_get_parent_ino(sfp);
- args->cmpresult = XFS_CMP_EXACT;
- args->filetype = XFS_DIR3_FT_DIR;
- return EEXIST;
- }
- /*
- * Loop over all the entries trying to match ours.
- */
- ci_sfep = NULL;
- for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
- i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
- /*
- * Compare name and if it's an exact match, return the inode
- * number. If it's the first case-insensitive match, store the
- * inode number and continue looking for an exact match.
- */
- cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name,
- sfep->namelen);
- if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
- args->cmpresult = cmp;
- 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 EEXIST;
- ci_sfep = sfep;
- }
- }
- ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
- /*
- * Here, we can only be doing a lookup (not a rename or replace).
- * If a case-insensitive match was not found, return ENOENT.
- */
- if (!ci_sfep)
- return ENOENT;
- /* otherwise process the CI match as required by the caller */
- error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
- return error;
-}
-
-/*
- * 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 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 = dp->d_ops->sf_nextentry(sfp, sfep)) {
- if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
- XFS_CMP_EXACT) {
- ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) ==
- args->inumber);
- break;
- }
- }
- /*
- * Didn't find it.
- */
- if (i == sfp->count)
- return ENOENT;
- /*
- * Calculate sizes.
- */
- byteoff = (int)((char *)sfep - (char *)sfp);
- entsize = dp->d_ops->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;
-}
-
-/*
- * 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 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 = dp->d_ops->sf_get_parent_ino(sfp);
- ASSERT(args->inumber != ino);
-#endif
- dp->d_ops->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 = dp->d_ops->sf_nextentry(sfp, sfep)) {
- if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
- XFS_CMP_EXACT) {
-#if XFS_BIG_INUMS || defined(DEBUG)
- ino = dp->d_ops->sf_get_ino(sfp, sfep);
- ASSERT(args->inumber != ino);
-#endif
- dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
- dp->d_ops->sf_put_ftype(sfep, args->filetype);
- 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 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;
-}
-
-#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 */
- int newsize; /* new inode size */
- xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
- xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
- int oldsize; /* old inode size */
- xfs_dir2_sf_entry_t *sfep; /* new sf entry */
- xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
- struct xfs_mount *mp;
-
- trace_xfs_dir2_sf_toino4(args);
-
- dp = args->dp;
- mp = dp->i_mount;
-
- /*
- * 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_hdr_t *)dp->i_df.if_u1.if_data;
- ASSERT(oldsfp->i8count == 1);
- memcpy(buf, oldsfp, oldsize);
- /*
- * Compute the new inode size.
- */
- newsize =
- oldsize -
- (oldsfp->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_hdr_t *)buf;
- sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
- /*
- * Fill in the new header.
- */
- sfp->count = oldsfp->count;
- sfp->i8count = 0;
- dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp));
- /*
- * Copy the entries field by field.
- */
- for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
- oldsfep = xfs_dir2_sf_firstentry(oldsfp);
- i < sfp->count;
- i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
- oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
- sfep->namelen = oldsfep->namelen;
- sfep->offset = oldsfep->offset;
- memcpy(sfep->name, oldsfep->name, sfep->namelen);
- 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.
- */
- kmem_free(buf);
- dp->i_d.di_size = newsize;
- xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
-}
-
-/*
- * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers.
- * The new entry w/ an 8-byte inode number is not there yet; we leave with
- * i8count set to 1, but no corresponding 8-byte 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 */
- int newsize; /* new inode size */
- xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
- xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
- int oldsize; /* old inode size */
- xfs_dir2_sf_entry_t *sfep; /* new sf entry */
- xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
- struct xfs_mount *mp;
-
- trace_xfs_dir2_sf_toino8(args);
-
- dp = args->dp;
- mp = dp->i_mount;
-
- /*
- * 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_hdr_t *)dp->i_df.if_u1.if_data;
- ASSERT(oldsfp->i8count == 0);
- memcpy(buf, oldsfp, oldsize);
- /*
- * Compute the new inode size (nb: entry count + 1 for parent)
- */
- newsize =
- oldsize +
- (oldsfp->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_hdr_t *)buf;
- sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
- /*
- * Fill in the new header.
- */
- sfp->count = oldsfp->count;
- sfp->i8count = 1;
- dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp));
- /*
- * Copy the entries field by field.
- */
- for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
- oldsfep = xfs_dir2_sf_firstentry(oldsfp);
- i < sfp->count;
- i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
- oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
- sfep->namelen = oldsfep->namelen;
- sfep->offset = oldsfep->offset;
- memcpy(sfep->name, oldsfep->name, sfep->namelen);
- 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.
- */
- kmem_free(buf);
- dp->i_d.di_size = newsize;
- xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
-}
-#endif /* XFS_BIG_INUMS */