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author | Dave Chinner <dchinner@redhat.com> | 2014-06-25 06:57:53 +0200 |
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committer | Dave Chinner <david@fromorbit.com> | 2014-06-25 06:57:53 +0200 |
commit | 30f712c9dd69348aa51351d5cb6d366bf4fae31d (patch) | |
tree | 9b246ca3986b784d8f9f6841466dfd4c90909e47 /fs/xfs/xfs_dir2_sf.c | |
parent | libxfs: move header files (diff) | |
download | linux-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.c | 1184 |
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 */ |