diff options
Diffstat (limited to 'fs/xfs/xfs_dir2_sf.c')
| -rw-r--r-- | fs/xfs/xfs_dir2_sf.c | 1317 |
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 0000000..6bbc616 --- /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 */ |
