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xfs: kill struct xfs_dir2_sf

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The list field of it is never cactually used, so all uses can simply be
replaced with the xfs_dir2_sf_hdr_t type that it has as first member.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Christoph Hellwig 2011-07-08 14:35:13 +02:00
parent 8bc3878758
commit ac8ba50f6b
4 changed files with 141 additions and 142 deletions
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6
fs/xfs/xfs_dir2.c
View File

@ -122,15 +122,15 @@ int
xfs_dir_isempty(
xfs_inode_t *dp)
{
xfs_dir2_sf_t *sfp;
xfs_dir2_sf_hdr_t *sfp;
ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
if (dp->i_d.di_size == 0) /* might happen during shutdown. */
return 1;
if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp))
return 0;
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
return !sfp->hdr.count;
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
return !sfp->count;
}
/*

42
fs/xfs/xfs_dir2_block.c
View File

@ -1028,8 +1028,6 @@ xfs_dir2_sf_to_block(
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
xfs_dabuf_t *bp; /* block buffer */
xfs_dir2_block_tail_t *btp; /* block tail pointer */
char *buf; /* sf buffer */
int buf_len;
xfs_dir2_data_entry_t *dep; /* data entry pointer */
xfs_inode_t *dp; /* incore directory inode */
int dummy; /* trash */
@ -1043,7 +1041,8 @@ xfs_dir2_sf_to_block(
int newoffset; /* offset from current entry */
int offset; /* target block offset */
xfs_dir2_sf_entry_t *sfep; /* sf entry pointer */
xfs_dir2_sf_t *sfp; /* shortform structure */
xfs_dir2_sf_hdr_t *oldsfp; /* old shortform header */
xfs_dir2_sf_hdr_t *sfp; /* shortform header */
__be16 *tagp; /* end of data entry */
xfs_trans_t *tp; /* transaction pointer */
struct xfs_name name;
@ -1061,32 +1060,30 @@ xfs_dir2_sf_to_block(
ASSERT(XFS_FORCED_SHUTDOWN(mp));
return XFS_ERROR(EIO);
}
oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
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));
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(oldsfp->i8count));
/*
* Copy the directory into the stack buffer.
* Copy the directory into a temporary buffer.
* Then pitch the incore inode data so we can make extents.
*/
sfp = kmem_alloc(dp->i_df.if_bytes, KM_SLEEP);
memcpy(sfp, oldsfp, dp->i_df.if_bytes);
buf_len = dp->i_df.if_bytes;
buf = kmem_alloc(buf_len, KM_SLEEP);
memcpy(buf, sfp, buf_len);
xfs_idata_realloc(dp, -buf_len, XFS_DATA_FORK);
xfs_idata_realloc(dp, -dp->i_df.if_bytes, XFS_DATA_FORK);
dp->i_d.di_size = 0;
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
/*
* Reset pointer - old sfp is gone.
*/
sfp = (xfs_dir2_sf_t *)buf;
/*
* Add block 0 to the inode.
*/
error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, &blkno);
if (error) {
kmem_free(buf);
kmem_free(sfp);
return error;
}
/*
@ -1094,7 +1091,7 @@ xfs_dir2_sf_to_block(
*/
error = xfs_dir2_data_init(args, blkno, &bp);
if (error) {
kmem_free(buf);
kmem_free(sfp);
return error;
}
block = bp->data;
@ -1103,7 +1100,7 @@ xfs_dir2_sf_to_block(
* Compute size of block "tail" area.
*/
i = (uint)sizeof(*btp) +
(sfp->hdr.count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t);
(sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t);
/*
* The whole thing is initialized to free by the init routine.
* Say we're using the leaf and tail area.
@ -1117,7 +1114,7 @@ xfs_dir2_sf_to_block(
* Fill in the tail.
*/
btp = xfs_dir2_block_tail_p(mp, block);
btp->count = cpu_to_be32(sfp->hdr.count + 2); /* ., .. */
btp->count = cpu_to_be32(sfp->count + 2); /* ., .. */
btp->stale = 0;
blp = xfs_dir2_block_leaf_p(btp);
endoffset = (uint)((char *)blp - (char *)block);
@ -1159,7 +1156,8 @@ xfs_dir2_sf_to_block(
/*
* Loop over existing entries, stuff them in.
*/
if ((i = 0) == sfp->hdr.count)
i = 0;
if (!sfp->count)
sfep = NULL;
else
sfep = xfs_dir2_sf_firstentry(sfp);
@ -1208,13 +1206,13 @@ xfs_dir2_sf_to_block(
blp[2 + i].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(mp,
(char *)dep - (char *)block));
offset = (int)((char *)(tagp + 1) - (char *)block);
if (++i == sfp->hdr.count)
if (++i == sfp->count)
sfep = NULL;
else
sfep = xfs_dir2_sf_nextentry(sfp, sfep);
}
/* Done with the temporary buffer */
kmem_free(buf);
kmem_free(sfp);
/*
* Sort the leaf entries by hash value.
*/

188
fs/xfs/xfs_dir2_sf.c
View File

@ -67,10 +67,10 @@ static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
*/
static xfs_ino_t
xfs_dir2_sf_get_ino(
struct xfs_dir2_sf *sfp,
struct xfs_dir2_sf_hdr *hdr,
xfs_dir2_inou_t *from)
{
if (sfp->hdr.i8count)
if (hdr->i8count)
return XFS_GET_DIR_INO8(from->i8);
else
return XFS_GET_DIR_INO4(from->i4);
@ -78,11 +78,11 @@ xfs_dir2_sf_get_ino(
static void
xfs_dir2_sf_put_ino(
struct xfs_dir2_sf *sfp,
struct xfs_dir2_sf_hdr *hdr,
xfs_dir2_inou_t *to,
xfs_ino_t ino)
{
if (sfp->hdr.i8count)
if (hdr->i8count)
XFS_PUT_DIR_INO8(ino, to->i8);
else
XFS_PUT_DIR_INO4(ino, to->i4);
@ -90,17 +90,17 @@ xfs_dir2_sf_put_ino(
xfs_ino_t
xfs_dir2_sf_get_parent_ino(
struct xfs_dir2_sf *sfp)
struct xfs_dir2_sf_hdr *hdr)
{
return xfs_dir2_sf_get_ino(sfp, &sfp->hdr.parent);
return xfs_dir2_sf_get_ino(hdr, &hdr->parent);
}
static void
xfs_dir2_sf_put_parent_ino(
struct xfs_dir2_sf *sfp,
struct xfs_dir2_sf_hdr *hdr,
xfs_ino_t ino)
{
xfs_dir2_sf_put_ino(sfp, &sfp->hdr.parent, ino);
xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino);
}
/*
@ -117,19 +117,19 @@ xfs_dir2_sfe_inop(
xfs_ino_t
xfs_dir2_sfe_get_ino(
struct xfs_dir2_sf *sfp,
struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep)
{
return xfs_dir2_sf_get_ino(sfp, xfs_dir2_sfe_inop(sfep));
return xfs_dir2_sf_get_ino(hdr, xfs_dir2_sfe_inop(sfep));
}
static void
xfs_dir2_sfe_put_ino(
struct xfs_dir2_sf *sfp,
struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep,
xfs_ino_t ino)
{
xfs_dir2_sf_put_ino(sfp, xfs_dir2_sfe_inop(sfep), ino);
xfs_dir2_sf_put_ino(hdr, xfs_dir2_sfe_inop(sfep), ino);
}
/*
@ -211,7 +211,7 @@ xfs_dir2_block_sfsize(
*/
sfhp->count = count;
sfhp->i8count = i8count;
xfs_dir2_sf_put_parent_ino((xfs_dir2_sf_t *)sfhp, parent);
xfs_dir2_sf_put_parent_ino(sfhp, parent);
return size;
}
@ -237,7 +237,7 @@ xfs_dir2_block_to_sf(
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_dir2_sf_hdr_t *sfp; /* shortform directory header */
trace_xfs_dir2_block_to_sf(args);
@ -270,7 +270,7 @@ xfs_dir2_block_to_sf(
/*
* Copy the header into the newly allocate local space.
*/
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
dp->i_d.di_size = size;
/*
@ -349,7 +349,7 @@ xfs_dir2_sf_addname(
xfs_dir2_data_aoff_t offset = 0; /* 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_hdr_t *sfp; /* shortform structure */
xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
trace_xfs_dir2_sf_addname(args);
@ -366,8 +366,8 @@ xfs_dir2_sf_addname(
}
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));
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.
*/
@ -378,7 +378,7 @@ xfs_dir2_sf_addname(
/*
* Do we have to change to 8 byte inodes?
*/
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
/*
* Yes, adjust the entry size and the total size.
*/
@ -386,7 +386,7 @@ xfs_dir2_sf_addname(
(uint)sizeof(xfs_dir2_ino8_t) -
(uint)sizeof(xfs_dir2_ino4_t);
incr_isize +=
(sfp->hdr.count + 2) *
(sfp->count + 2) *
((uint)sizeof(xfs_dir2_ino8_t) -
(uint)sizeof(xfs_dir2_ino4_t));
objchange = 1;
@ -456,11 +456,11 @@ xfs_dir2_sf_addname_easy(
{
int byteoff; /* byte offset in sf dir */
xfs_inode_t *dp; /* incore directory inode */
xfs_dir2_sf_t *sfp; /* shortform structure */
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
dp = args->dp;
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
byteoff = (int)((char *)sfep - (char *)sfp);
/*
* Grow the in-inode space.
@ -470,7 +470,7 @@ xfs_dir2_sf_addname_easy(
/*
* Need to set up again due to realloc of the inode data.
*/
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_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.
@ -482,10 +482,10 @@ xfs_dir2_sf_addname_easy(
/*
* Update the header and inode.
*/
sfp->hdr.count++;
sfp->count++;
#if XFS_BIG_INUMS
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
sfp->hdr.i8count++;
sfp->i8count++;
#endif
dp->i_d.di_size = new_isize;
xfs_dir2_sf_check(args);
@ -515,19 +515,19 @@ xfs_dir2_sf_addname_hard(
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_hdr_t *oldsfp; /* original shortform dir */
xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
xfs_dir2_sf_t *sfp; /* new shortform dir */
xfs_dir2_sf_hdr_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;
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_t *)buf;
oldsfp = (xfs_dir2_sf_hdr_t *)buf;
memcpy(oldsfp, sfp, old_isize);
/*
* Loop over the old directory finding the place we're going
@ -556,7 +556,7 @@ xfs_dir2_sf_addname_hard(
/*
* Reset the pointer since the buffer was reallocated.
*/
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
/*
* Copy the first part of the directory, including the header.
*/
@ -570,10 +570,10 @@ xfs_dir2_sf_addname_hard(
xfs_dir2_sf_put_offset(sfep, offset);
memcpy(sfep->name, args->name, sfep->namelen);
xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber);
sfp->hdr.count++;
sfp->count++;
#if XFS_BIG_INUMS
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
sfp->hdr.i8count++;
sfp->i8count++;
#endif
/*
* If there's more left to copy, do that.
@ -607,14 +607,14 @@ xfs_dir2_sf_addname_pick(
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 */
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_t *)dp->i_df.if_u1.if_data;
sfp = (xfs_dir2_sf_hdr_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);
@ -624,7 +624,7 @@ xfs_dir2_sf_addname_pick(
* 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++) {
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) +
@ -636,7 +636,7 @@ xfs_dir2_sf_addname_pick(
* was a data block (block form directory).
*/
used = offset +
(sfp->hdr.count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
(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,
@ -682,17 +682,17 @@ xfs_dir2_sf_check(
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 */
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
dp = args->dp;
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
offset = XFS_DIR2_DATA_FIRST_OFFSET;
ino = xfs_dir2_sf_get_parent_ino(sfp);
i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
i < sfp->hdr.count;
i < sfp->count;
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
ino = xfs_dir2_sfe_get_ino(sfp, sfep);
@ -701,11 +701,11 @@ xfs_dir2_sf_check(
xfs_dir2_sf_get_offset(sfep) +
xfs_dir2_data_entsize(sfep->namelen);
}
ASSERT(i8count == sfp->hdr.i8count);
ASSERT(i8count == sfp->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) +
(sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
(uint)sizeof(xfs_dir2_block_tail_t) <=
dp->i_mount->m_dirblksize);
}
@ -721,7 +721,7 @@ xfs_dir2_sf_create(
{
xfs_inode_t *dp; /* incore directory inode */
int i8count; /* parent inode is an 8-byte number */
xfs_dir2_sf_t *sfp; /* shortform structure */
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
int size; /* directory size */
trace_xfs_dir2_sf_create(args);
@ -751,13 +751,13 @@ xfs_dir2_sf_create(
/*
* Fill in the header,
*/
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
sfp->hdr.i8count = i8count;
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.
*/
xfs_dir2_sf_put_parent_ino(sfp, pino);
sfp->hdr.count = 0;
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);
@ -775,7 +775,7 @@ xfs_dir2_sf_getdents(
xfs_mount_t *mp; /* filesystem mount point */
xfs_dir2_dataptr_t off; /* current entry's offset */
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
xfs_dir2_sf_t *sfp; /* shortform structure */
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
xfs_dir2_dataptr_t dot_offset;
xfs_dir2_dataptr_t dotdot_offset;
xfs_ino_t ino;
@ -794,9 +794,9 @@ xfs_dir2_sf_getdents(
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;
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->hdr.i8count));
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
/*
* If the block number in the offset is out of range, we're done.
@ -840,7 +840,7 @@ xfs_dir2_sf_getdents(
* Loop while there are more entries and put'ing works.
*/
sfep = xfs_dir2_sf_firstentry(sfp);
for (i = 0; i < sfp->hdr.count; i++) {
for (i = 0; i < sfp->count; i++) {
off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
xfs_dir2_sf_get_offset(sfep));
@ -875,7 +875,7 @@ xfs_dir2_sf_lookup(
int i; /* entry index */
int error;
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
xfs_dir2_sf_t *sfp; /* shortform structure */
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
enum xfs_dacmp cmp; /* comparison result */
xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
@ -894,8 +894,8 @@ xfs_dir2_sf_lookup(
}
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));
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 .
*/
@ -917,7 +917,7 @@ xfs_dir2_sf_lookup(
* Loop over all the entries trying to match ours.
*/
ci_sfep = NULL;
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->hdr.count;
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
/*
* Compare name and if it's an exact match, return the inode
@ -960,7 +960,7 @@ xfs_dir2_sf_removename(
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_sf_hdr_t *sfp; /* shortform structure */
trace_xfs_dir2_sf_removename(args);
@ -977,13 +977,13 @@ xfs_dir2_sf_removename(
}
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));
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->hdr.count;
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
XFS_CMP_EXACT) {
@ -995,7 +995,7 @@ xfs_dir2_sf_removename(
/*
* Didn't find it.
*/
if (i == sfp->hdr.count)
if (i == sfp->count)
return XFS_ERROR(ENOENT);
/*
* Calculate sizes.
@ -1012,22 +1012,22 @@ xfs_dir2_sf_removename(
/*
* Fix up the header and file size.
*/
sfp->hdr.count--;
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_t *)dp->i_df.if_u1.if_data;
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->hdr.i8count == 1)
if (sfp->i8count == 1)
xfs_dir2_sf_toino4(args);
else
sfp->hdr.i8count--;
sfp->i8count--;
}
#endif
xfs_dir2_sf_check(args);
@ -1051,7 +1051,7 @@ xfs_dir2_sf_replace(
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_sf_hdr_t *sfp; /* shortform structure */
trace_xfs_dir2_sf_replace(args);
@ -1067,19 +1067,19 @@ xfs_dir2_sf_replace(
}
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));
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->hdr.i8count == 0) {
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->hdr.count + 1) *
(sfp->count + 1) *
((uint)sizeof(xfs_dir2_ino8_t) -
(uint)sizeof(xfs_dir2_ino4_t));
/*
@ -1097,7 +1097,7 @@ xfs_dir2_sf_replace(
*/
xfs_dir2_sf_toino8(args);
i8elevated = 1;
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
} else
i8elevated = 0;
#endif
@ -1118,7 +1118,7 @@ xfs_dir2_sf_replace(
*/
else {
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
i < sfp->hdr.count;
i < sfp->count;
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
XFS_CMP_EXACT) {
@ -1133,7 +1133,7 @@ xfs_dir2_sf_replace(
/*
* Didn't find it.
*/
if (i == sfp->hdr.count) {
if (i == sfp->count) {
ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
#if XFS_BIG_INUMS
if (i8elevated)
@ -1151,10 +1151,10 @@ xfs_dir2_sf_replace(
/*
* And the old count was one, so need to convert to small.
*/
if (sfp->hdr.i8count == 1)
if (sfp->i8count == 1)
xfs_dir2_sf_toino4(args);
else
sfp->hdr.i8count--;
sfp->i8count--;
}
/*
* See if the old number was small, the new number is large.
@ -1165,9 +1165,9 @@ xfs_dir2_sf_replace(
* add to the i8count unless we just converted to 8-byte
* inodes (which does an implied i8count = 1)
*/
ASSERT(sfp->hdr.i8count != 0);
ASSERT(sfp->i8count != 0);
if (!i8elevated)
sfp->hdr.i8count++;
sfp->i8count++;
}
#endif
xfs_dir2_sf_check(args);
@ -1189,10 +1189,10 @@ xfs_dir2_sf_toino4(
int i; /* entry index */
int newsize; /* new inode size */
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
xfs_dir2_sf_t *oldsfp; /* old sf directory */
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_t *sfp; /* new sf directory */
xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
trace_xfs_dir2_sf_toino4(args);
@ -1205,35 +1205,35 @@ xfs_dir2_sf_toino4(
*/
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);
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->hdr.count + 1) *
(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_t *)buf;
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
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->hdr.count = oldsfp->hdr.count;
sfp->hdr.i8count = 0;
sfp->count = oldsfp->count;
sfp->i8count = 0;
xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_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->hdr.count;
i < sfp->count;
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
sfep->namelen = oldsfep->namelen;
@ -1264,10 +1264,10 @@ xfs_dir2_sf_toino8(
int i; /* entry index */
int newsize; /* new inode size */
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
xfs_dir2_sf_t *oldsfp; /* old sf directory */
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_t *sfp; /* new sf directory */
xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
trace_xfs_dir2_sf_toino8(args);
@ -1280,35 +1280,35 @@ xfs_dir2_sf_toino8(
*/
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);
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.
*/
newsize =
oldsize +
(oldsfp->hdr.count + 1) *
(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_t *)buf;
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
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->hdr.count = oldsfp->hdr.count;
sfp->hdr.i8count = 1;
sfp->count = oldsfp->count;
sfp->i8count = 1;
xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_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->hdr.count;
i < sfp->count;
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
sfep->namelen = oldsfep->namelen;

47
fs/xfs/xfs_dir2_sf.h
View File

@ -21,8 +21,12 @@
/*
* Directory layout when stored internal to an inode.
*
* Small directories are packed as tightly as possible so as to
* fit into the literal area of the inode.
* Small directories are packed as tightly as possible so as to fit into the
* literal area of the inode. They consist of a single xfs_dir2_sf_hdr header
* followed by zero or more xfs_dir2_sf_entry structures. Due the different
* inode number storage size and the variable length name field in
* the xfs_dir2_sf_entry all these structure are variable length, and the
* accessors in this file should be used to iterate over them.
*/
struct uio;
@ -61,9 +65,9 @@ typedef struct { __uint8_t i[2]; } __arch_pack xfs_dir2_sf_off_t;
* The parent directory has a dedicated field, and the self-pointer must
* be calculated on the fly.
*
* Entries are packed toward the top as tightly as possible. The header
* and the elements must be memcpy'd out into a work area to get correct
* alignment for the inode number fields.
* Entries are packed toward the top as tightly as possible, and thus may
* be misaligned. Care needs to be taken to access them through special
* helpers or copy them into aligned variables first.
*/
typedef struct xfs_dir2_sf_hdr {
__uint8_t count; /* count of entries */
@ -78,11 +82,6 @@ typedef struct xfs_dir2_sf_entry {
xfs_dir2_inou_t inumber; /* inode number, var. offset */
} __arch_pack xfs_dir2_sf_entry_t;
typedef struct xfs_dir2_sf {
xfs_dir2_sf_hdr_t hdr; /* shortform header */
xfs_dir2_sf_entry_t list[1]; /* shortform entries */
} xfs_dir2_sf_t;
static inline int xfs_dir2_sf_hdr_size(int i8count)
{
return ((uint)sizeof(xfs_dir2_sf_hdr_t) - \
@ -102,39 +101,41 @@ xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep, xfs_dir2_data_aoff_t off)
INT_SET_UNALIGNED_16_BE(&(sfep)->offset.i, off);
}
static inline int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_t *sfp, int len)
static inline int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_hdr_t *sfp, int len)
{
return ((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (len) - \
((sfp)->hdr.i8count == 0) * \
((sfp)->i8count == 0) * \
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)));
}
static inline int
xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_t *sfp, xfs_dir2_sf_entry_t *sfep)
xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_hdr_t *sfp, xfs_dir2_sf_entry_t *sfep)
{
return ((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (sfep)->namelen - \
((sfp)->hdr.i8count == 0) * \
((sfp)->i8count == 0) * \
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)));
}
static inline xfs_dir2_sf_entry_t *xfs_dir2_sf_firstentry(xfs_dir2_sf_t *sfp)
static inline struct xfs_dir2_sf_entry *
xfs_dir2_sf_firstentry(struct xfs_dir2_sf_hdr *hdr)
{
return ((xfs_dir2_sf_entry_t *) \
((char *)(sfp) + xfs_dir2_sf_hdr_size(sfp->hdr.i8count)));
return (struct xfs_dir2_sf_entry *)
((char *)hdr + xfs_dir2_sf_hdr_size(hdr->i8count));
}
static inline xfs_dir2_sf_entry_t *
xfs_dir2_sf_nextentry(xfs_dir2_sf_t *sfp, xfs_dir2_sf_entry_t *sfep)
static inline struct xfs_dir2_sf_entry *
xfs_dir2_sf_nextentry(struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep)
{
return ((xfs_dir2_sf_entry_t *) \
((char *)(sfep) + xfs_dir2_sf_entsize_byentry(sfp,sfep)));
return (struct xfs_dir2_sf_entry *)
((char *)sfep + xfs_dir2_sf_entsize_byentry(hdr, sfep));
}
/*
* Functions.
*/
extern xfs_ino_t xfs_dir2_sf_get_parent_ino(struct xfs_dir2_sf *sfp);
extern xfs_ino_t xfs_dir2_sfe_get_ino(struct xfs_dir2_sf *sfp,
extern xfs_ino_t xfs_dir2_sf_get_parent_ino(struct xfs_dir2_sf_hdr *sfp);
extern xfs_ino_t xfs_dir2_sfe_get_ino(struct xfs_dir2_sf_hdr *sfp,
struct xfs_dir2_sf_entry *sfep);
extern int xfs_dir2_block_sfsize(struct xfs_inode *dp,
struct xfs_dir2_block *block,