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-rw-r--r--fs/reiserfs/lbalance.c501
1 files changed, 308 insertions, 193 deletions
diff --git a/fs/reiserfs/lbalance.c b/fs/reiserfs/lbalance.c
index 79e5a8b4c226..d6744c8b24e1 100644
--- a/fs/reiserfs/lbalance.c
+++ b/fs/reiserfs/lbalance.c
@@ -8,46 +8,42 @@
#include "reiserfs.h"
#include <linux/buffer_head.h>
-/* these are used in do_balance.c */
-
-/* leaf_move_items
- leaf_shift_left
- leaf_shift_right
- leaf_delete_items
- leaf_insert_into_buf
- leaf_paste_in_buffer
- leaf_cut_from_buffer
- leaf_paste_entries
- */
-
-/* copy copy_count entries from source directory item to dest buffer (creating new item if needed) */
+/*
+ * copy copy_count entries from source directory item to dest buffer
+ * (creating new item if needed)
+ */
static void leaf_copy_dir_entries(struct buffer_info *dest_bi,
struct buffer_head *source, int last_first,
int item_num, int from, int copy_count)
{
struct buffer_head *dest = dest_bi->bi_bh;
- int item_num_in_dest; /* either the number of target item,
- or if we must create a new item,
- the number of the item we will
- create it next to */
+ /*
+ * either the number of target item, or if we must create a
+ * new item, the number of the item we will create it next to
+ */
+ int item_num_in_dest;
+
struct item_head *ih;
struct reiserfs_de_head *deh;
int copy_records_len; /* length of all records in item to be copied */
char *records;
- ih = B_N_PITEM_HEAD(source, item_num);
+ ih = item_head(source, item_num);
RFALSE(!is_direntry_le_ih(ih), "vs-10000: item must be directory item");
- /* length of all record to be copied and first byte of the last of them */
+ /*
+ * length of all record to be copied and first byte of
+ * the last of them
+ */
deh = B_I_DEH(source, ih);
if (copy_count) {
- copy_records_len = (from ? deh_location(&(deh[from - 1])) :
+ copy_records_len = (from ? deh_location(&deh[from - 1]) :
ih_item_len(ih)) -
- deh_location(&(deh[from + copy_count - 1]));
+ deh_location(&deh[from + copy_count - 1]);
records =
source->b_data + ih_location(ih) +
- deh_location(&(deh[from + copy_count - 1]));
+ deh_location(&deh[from + copy_count - 1]);
} else {
copy_records_len = 0;
records = NULL;
@@ -59,12 +55,15 @@ static void leaf_copy_dir_entries(struct buffer_info *dest_bi,
LAST_TO_FIRST) ? ((B_NR_ITEMS(dest)) ? 0 : -1) : (B_NR_ITEMS(dest)
- 1);
- /* if there are no items in dest or the first/last item in dest is not item of the same directory */
+ /*
+ * if there are no items in dest or the first/last item in
+ * dest is not item of the same directory
+ */
if ((item_num_in_dest == -1) ||
(last_first == FIRST_TO_LAST && le_ih_k_offset(ih) == DOT_OFFSET) ||
(last_first == LAST_TO_FIRST
&& comp_short_le_keys /*COMP_SHORT_KEYS */ (&ih->ih_key,
- B_N_PKEY(dest,
+ leaf_key(dest,
item_num_in_dest))))
{
/* create new item in dest */
@@ -80,16 +79,22 @@ static void leaf_copy_dir_entries(struct buffer_info *dest_bi,
if (last_first == LAST_TO_FIRST) {
/* form key by the following way */
- if (from < I_ENTRY_COUNT(ih)) {
+ if (from < ih_entry_count(ih)) {
set_le_ih_k_offset(&new_ih,
- deh_offset(&(deh[from])));
- /*memcpy (&new_ih.ih_key.k_offset, &deh[from].deh_offset, SHORT_KEY_SIZE); */
+ deh_offset(&deh[from]));
} else {
- /* no entries will be copied to this item in this function */
+ /*
+ * no entries will be copied to this
+ * item in this function
+ */
set_le_ih_k_offset(&new_ih, U32_MAX);
- /* this item is not yet valid, but we want I_IS_DIRECTORY_ITEM to return 1 for it, so we -1 */
+ /*
+ * this item is not yet valid, but we
+ * want I_IS_DIRECTORY_ITEM to return 1
+ * for it, so we -1
+ */
}
- set_le_key_k_type(KEY_FORMAT_3_5, &(new_ih.ih_key),
+ set_le_key_k_type(KEY_FORMAT_3_5, &new_ih.ih_key,
TYPE_DIRENTRY);
}
@@ -113,36 +118,44 @@ static void leaf_copy_dir_entries(struct buffer_info *dest_bi,
leaf_paste_entries(dest_bi, item_num_in_dest,
(last_first ==
- FIRST_TO_LAST) ? I_ENTRY_COUNT(B_N_PITEM_HEAD(dest,
+ FIRST_TO_LAST) ? ih_entry_count(item_head(dest,
item_num_in_dest))
: 0, copy_count, deh + from, records,
DEH_SIZE * copy_count + copy_records_len);
}
-/* Copy the first (if last_first == FIRST_TO_LAST) or last (last_first == LAST_TO_FIRST) item or
- part of it or nothing (see the return 0 below) from SOURCE to the end
- (if last_first) or beginning (!last_first) of the DEST */
+/*
+ * Copy the first (if last_first == FIRST_TO_LAST) or last
+ * (last_first == LAST_TO_FIRST) item or part of it or nothing
+ * (see the return 0 below) from SOURCE to the end (if last_first)
+ * or beginning (!last_first) of the DEST
+ */
/* returns 1 if anything was copied, else 0 */
static int leaf_copy_boundary_item(struct buffer_info *dest_bi,
struct buffer_head *src, int last_first,
int bytes_or_entries)
{
struct buffer_head *dest = dest_bi->bi_bh;
- int dest_nr_item, src_nr_item; /* number of items in the source and destination buffers */
+ /* number of items in the source and destination buffers */
+ int dest_nr_item, src_nr_item;
struct item_head *ih;
struct item_head *dih;
dest_nr_item = B_NR_ITEMS(dest);
+ /*
+ * if ( DEST is empty or first item of SOURCE and last item of
+ * DEST are the items of different objects or of different types )
+ * then there is no need to treat this item differently from the
+ * other items that we copy, so we return
+ */
if (last_first == FIRST_TO_LAST) {
- /* if ( DEST is empty or first item of SOURCE and last item of DEST are the items of different objects
- or of different types ) then there is no need to treat this item differently from the other items
- that we copy, so we return */
- ih = B_N_PITEM_HEAD(src, 0);
- dih = B_N_PITEM_HEAD(dest, dest_nr_item - 1);
+ ih = item_head(src, 0);
+ dih = item_head(dest, dest_nr_item - 1);
+
+ /* there is nothing to merge */
if (!dest_nr_item
- || (!op_is_left_mergeable(&(ih->ih_key), src->b_size)))
- /* there is nothing to merge */
+ || (!op_is_left_mergeable(&ih->ih_key, src->b_size)))
return 0;
RFALSE(!ih_item_len(ih),
@@ -157,8 +170,11 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi,
return 1;
}
- /* copy part of the body of the first item of SOURCE to the end of the body of the last item of the DEST
- part defined by 'bytes_or_entries'; if bytes_or_entries == -1 copy whole body; don't create new item header
+ /*
+ * copy part of the body of the first item of SOURCE
+ * to the end of the body of the last item of the DEST
+ * part defined by 'bytes_or_entries'; if bytes_or_entries
+ * == -1 copy whole body; don't create new item header
*/
if (bytes_or_entries == -1)
bytes_or_entries = ih_item_len(ih);
@@ -176,11 +192,13 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi,
}
#endif
- /* merge first item (or its part) of src buffer with the last
- item of dest buffer. Both are of the same file */
+ /*
+ * merge first item (or its part) of src buffer with the last
+ * item of dest buffer. Both are of the same file
+ */
leaf_paste_in_buffer(dest_bi,
dest_nr_item - 1, ih_item_len(dih),
- bytes_or_entries, B_I_PITEM(src, ih), 0);
+ bytes_or_entries, ih_item_body(src, ih), 0);
if (is_indirect_le_ih(dih)) {
RFALSE(get_ih_free_space(dih),
@@ -195,19 +213,23 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi,
/* copy boundary item to right (last_first == LAST_TO_FIRST) */
- /* ( DEST is empty or last item of SOURCE and first item of DEST
- are the items of different object or of different types )
+ /*
+ * (DEST is empty or last item of SOURCE and first item of DEST
+ * are the items of different object or of different types)
*/
src_nr_item = B_NR_ITEMS(src);
- ih = B_N_PITEM_HEAD(src, src_nr_item - 1);
- dih = B_N_PITEM_HEAD(dest, 0);
+ ih = item_head(src, src_nr_item - 1);
+ dih = item_head(dest, 0);
- if (!dest_nr_item || !op_is_left_mergeable(&(dih->ih_key), src->b_size))
+ if (!dest_nr_item || !op_is_left_mergeable(&dih->ih_key, src->b_size))
return 0;
if (is_direntry_le_ih(ih)) {
+ /*
+ * bytes_or_entries = entries number in last
+ * item body of SOURCE
+ */
if (bytes_or_entries == -1)
- /* bytes_or_entries = entries number in last item body of SOURCE */
bytes_or_entries = ih_entry_count(ih);
leaf_copy_dir_entries(dest_bi, src, LAST_TO_FIRST,
@@ -217,9 +239,11 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi,
return 1;
}
- /* copy part of the body of the last item of SOURCE to the begin of the body of the first item of the DEST;
- part defined by 'bytes_or_entries'; if byte_or_entriess == -1 copy whole body; change first item key of the DEST;
- don't create new item header
+ /*
+ * copy part of the body of the last item of SOURCE to the
+ * begin of the body of the first item of the DEST; part defined
+ * by 'bytes_or_entries'; if byte_or_entriess == -1 copy whole body;
+ * change first item key of the DEST; don't create new item header
*/
RFALSE(is_indirect_le_ih(ih) && get_ih_free_space(ih),
@@ -270,15 +294,18 @@ static int leaf_copy_boundary_item(struct buffer_info *dest_bi,
}
leaf_paste_in_buffer(dest_bi, 0, 0, bytes_or_entries,
- B_I_PITEM(src,
+ ih_item_body(src,
ih) + ih_item_len(ih) - bytes_or_entries,
0);
return 1;
}
-/* copy cpy_mun items from buffer src to buffer dest
- * last_first == FIRST_TO_LAST means, that we copy cpy_num items beginning from first-th item in src to tail of dest
- * last_first == LAST_TO_FIRST means, that we copy cpy_num items beginning from first-th item in src to head of dest
+/*
+ * copy cpy_mun items from buffer src to buffer dest
+ * last_first == FIRST_TO_LAST means, that we copy cpy_num items beginning
+ * from first-th item in src to tail of dest
+ * last_first == LAST_TO_FIRST means, that we copy cpy_num items beginning
+ * from first-th item in src to head of dest
*/
static void leaf_copy_items_entirely(struct buffer_info *dest_bi,
struct buffer_head *src, int last_first,
@@ -311,11 +338,14 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi,
nr = blkh_nr_item(blkh);
free_space = blkh_free_space(blkh);
- /* we will insert items before 0-th or nr-th item in dest buffer. It depends of last_first parameter */
+ /*
+ * we will insert items before 0-th or nr-th item in dest buffer.
+ * It depends of last_first parameter
+ */
dest_before = (last_first == LAST_TO_FIRST) ? 0 : nr;
/* location of head of first new item */
- ih = B_N_PITEM_HEAD(dest, dest_before);
+ ih = item_head(dest, dest_before);
RFALSE(blkh_free_space(blkh) < cpy_num * IH_SIZE,
"vs-10140: not enough free space for headers %d (needed %d)",
@@ -325,7 +355,7 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi,
memmove(ih + cpy_num, ih, (nr - dest_before) * IH_SIZE);
/* copy item headers */
- memcpy(ih, B_N_PITEM_HEAD(src, first), cpy_num * IH_SIZE);
+ memcpy(ih, item_head(src, first), cpy_num * IH_SIZE);
free_space -= (IH_SIZE * cpy_num);
set_blkh_free_space(blkh, free_space);
@@ -338,8 +368,8 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi,
}
/* prepare space for items */
- last_loc = ih_location(&(ih[nr + cpy_num - 1 - dest_before]));
- last_inserted_loc = ih_location(&(ih[cpy_num - 1]));
+ last_loc = ih_location(&ih[nr + cpy_num - 1 - dest_before]);
+ last_inserted_loc = ih_location(&ih[cpy_num - 1]);
/* check free space */
RFALSE(free_space < j - last_inserted_loc,
@@ -352,7 +382,8 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi,
/* copy items */
memcpy(dest->b_data + last_inserted_loc,
- B_N_PITEM(src, (first + cpy_num - 1)), j - last_inserted_loc);
+ item_body(src, (first + cpy_num - 1)),
+ j - last_inserted_loc);
/* sizes, item number */
set_blkh_nr_item(blkh, nr + cpy_num);
@@ -376,8 +407,10 @@ static void leaf_copy_items_entirely(struct buffer_info *dest_bi,
}
}
-/* This function splits the (liquid) item into two items (useful when
- shifting part of an item into another node.) */
+/*
+ * This function splits the (liquid) item into two items (useful when
+ * shifting part of an item into another node.)
+ */
static void leaf_item_bottle(struct buffer_info *dest_bi,
struct buffer_head *src, int last_first,
int item_num, int cpy_bytes)
@@ -389,17 +422,22 @@ static void leaf_item_bottle(struct buffer_info *dest_bi,
"vs-10170: bytes == - 1 means: do not split item");
if (last_first == FIRST_TO_LAST) {
- /* if ( if item in position item_num in buffer SOURCE is directory item ) */
- ih = B_N_PITEM_HEAD(src, item_num);
+ /*
+ * if ( if item in position item_num in buffer SOURCE
+ * is directory item )
+ */
+ ih = item_head(src, item_num);
if (is_direntry_le_ih(ih))
leaf_copy_dir_entries(dest_bi, src, FIRST_TO_LAST,
item_num, 0, cpy_bytes);
else {
struct item_head n_ih;
- /* copy part of the body of the item number 'item_num' of SOURCE to the end of the DEST
- part defined by 'cpy_bytes'; create new item header; change old item_header (????);
- n_ih = new item_header;
+ /*
+ * copy part of the body of the item number 'item_num'
+ * of SOURCE to the end of the DEST part defined by
+ * 'cpy_bytes'; create new item header; change old
+ * item_header (????); n_ih = new item_header;
*/
memcpy(&n_ih, ih, IH_SIZE);
put_ih_item_len(&n_ih, cpy_bytes);
@@ -411,30 +449,36 @@ static void leaf_item_bottle(struct buffer_info *dest_bi,
set_ih_free_space(&n_ih, 0);
}
- RFALSE(op_is_left_mergeable(&(ih->ih_key), src->b_size),
+ RFALSE(op_is_left_mergeable(&ih->ih_key, src->b_size),
"vs-10190: bad mergeability of item %h", ih);
n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */
leaf_insert_into_buf(dest_bi, B_NR_ITEMS(dest), &n_ih,
- B_N_PITEM(src, item_num), 0);
+ item_body(src, item_num), 0);
}
} else {
- /* if ( if item in position item_num in buffer SOURCE is directory item ) */
- ih = B_N_PITEM_HEAD(src, item_num);
+ /*
+ * if ( if item in position item_num in buffer
+ * SOURCE is directory item )
+ */
+ ih = item_head(src, item_num);
if (is_direntry_le_ih(ih))
leaf_copy_dir_entries(dest_bi, src, LAST_TO_FIRST,
item_num,
- I_ENTRY_COUNT(ih) - cpy_bytes,
+ ih_entry_count(ih) - cpy_bytes,
cpy_bytes);
else {
struct item_head n_ih;
- /* copy part of the body of the item number 'item_num' of SOURCE to the begin of the DEST
- part defined by 'cpy_bytes'; create new item header;
- n_ih = new item_header;
+ /*
+ * copy part of the body of the item number 'item_num'
+ * of SOURCE to the begin of the DEST part defined by
+ * 'cpy_bytes'; create new item header;
+ * n_ih = new item_header;
*/
memcpy(&n_ih, ih, SHORT_KEY_SIZE);
- n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */
+ /* Endian safe, both le */
+ n_ih.ih_version = ih->ih_version;
if (is_direct_le_ih(ih)) {
set_le_ih_k_offset(&n_ih,
@@ -458,20 +502,22 @@ static void leaf_item_bottle(struct buffer_info *dest_bi,
/* set item length */
put_ih_item_len(&n_ih, cpy_bytes);
- n_ih.ih_version = ih->ih_version; /* JDM Endian safe, both le */
+ /* Endian safe, both le */
+ n_ih.ih_version = ih->ih_version;
leaf_insert_into_buf(dest_bi, 0, &n_ih,
- B_N_PITEM(src,
- item_num) +
- ih_item_len(ih) - cpy_bytes, 0);
+ item_body(src, item_num) +
+ ih_item_len(ih) - cpy_bytes, 0);
}
}
}
-/* If cpy_bytes equals minus one than copy cpy_num whole items from SOURCE to DEST.
- If cpy_bytes not equal to minus one than copy cpy_num-1 whole items from SOURCE to DEST.
- From last item copy cpy_num bytes for regular item and cpy_num directory entries for
- directory item. */
+/*
+ * If cpy_bytes equals minus one than copy cpy_num whole items from SOURCE
+ * to DEST. If cpy_bytes not equal to minus one than copy cpy_num-1 whole
+ * items from SOURCE to DEST. From last item copy cpy_num bytes for regular
+ * item and cpy_num directory entries for directory item.
+ */
static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src,
int last_first, int cpy_num, int cpy_bytes)
{
@@ -498,22 +544,34 @@ static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src,
else
bytes = -1;
- /* copy the first item or it part or nothing to the end of the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,0,bytes)) */
+ /*
+ * copy the first item or it part or nothing to the end of
+ * the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,0,bytes))
+ */
i = leaf_copy_boundary_item(dest_bi, src, FIRST_TO_LAST, bytes);
cpy_num -= i;
if (cpy_num == 0)
return i;
pos += i;
if (cpy_bytes == -1)
- /* copy first cpy_num items starting from position 'pos' of SOURCE to end of DEST */
+ /*
+ * copy first cpy_num items starting from position
+ * 'pos' of SOURCE to end of DEST
+ */
leaf_copy_items_entirely(dest_bi, src, FIRST_TO_LAST,
pos, cpy_num);
else {
- /* copy first cpy_num-1 items starting from position 'pos-1' of the SOURCE to the end of the DEST */
+ /*
+ * copy first cpy_num-1 items starting from position
+ * 'pos-1' of the SOURCE to the end of the DEST
+ */
leaf_copy_items_entirely(dest_bi, src, FIRST_TO_LAST,
pos, cpy_num - 1);
- /* copy part of the item which number is cpy_num+pos-1 to the end of the DEST */
+ /*
+ * copy part of the item which number is
+ * cpy_num+pos-1 to the end of the DEST
+ */
leaf_item_bottle(dest_bi, src, FIRST_TO_LAST,
cpy_num + pos - 1, cpy_bytes);
}
@@ -525,7 +583,11 @@ static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src,
else
bytes = -1;
- /* copy the last item or it part or nothing to the begin of the DEST (i = leaf_copy_boundary_item(DEST,SOURCE,1,bytes)); */
+ /*
+ * copy the last item or it part or nothing to the
+ * begin of the DEST
+ * (i = leaf_copy_boundary_item(DEST,SOURCE,1,bytes));
+ */
i = leaf_copy_boundary_item(dest_bi, src, LAST_TO_FIRST, bytes);
cpy_num -= i;
@@ -534,15 +596,24 @@ static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src,
pos = src_nr_item - cpy_num - i;
if (cpy_bytes == -1) {
- /* starting from position 'pos' copy last cpy_num items of SOURCE to begin of DEST */
+ /*
+ * starting from position 'pos' copy last cpy_num
+ * items of SOURCE to begin of DEST
+ */
leaf_copy_items_entirely(dest_bi, src, LAST_TO_FIRST,
pos, cpy_num);
} else {
- /* copy last cpy_num-1 items starting from position 'pos+1' of the SOURCE to the begin of the DEST; */
+ /*
+ * copy last cpy_num-1 items starting from position
+ * 'pos+1' of the SOURCE to the begin of the DEST;
+ */
leaf_copy_items_entirely(dest_bi, src, LAST_TO_FIRST,
pos + 1, cpy_num - 1);
- /* copy part of the item which number is pos to the begin of the DEST */
+ /*
+ * copy part of the item which number is pos to
+ * the begin of the DEST
+ */
leaf_item_bottle(dest_bi, src, LAST_TO_FIRST, pos,
cpy_bytes);
}
@@ -550,9 +621,11 @@ static int leaf_copy_items(struct buffer_info *dest_bi, struct buffer_head *src,
return i;
}
-/* there are types of coping: from S[0] to L[0], from S[0] to R[0],
- from R[0] to L[0]. for each of these we have to define parent and
- positions of destination and source buffers */
+/*
+ * there are types of coping: from S[0] to L[0], from S[0] to R[0],
+ * from R[0] to L[0]. for each of these we have to define parent and
+ * positions of destination and source buffers
+ */
static void leaf_define_dest_src_infos(int shift_mode, struct tree_balance *tb,
struct buffer_info *dest_bi,
struct buffer_info *src_bi,
@@ -568,7 +641,9 @@ static void leaf_define_dest_src_infos(int shift_mode, struct tree_balance *tb,
src_bi->tb = tb;
src_bi->bi_bh = PATH_PLAST_BUFFER(tb->tb_path);
src_bi->bi_parent = PATH_H_PPARENT(tb->tb_path, 0);
- src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0); /* src->b_item_order */
+
+ /* src->b_item_order */
+ src_bi->bi_position = PATH_H_B_ITEM_ORDER(tb->tb_path, 0);
dest_bi->tb = tb;
dest_bi->bi_bh = tb->L[0];
dest_bi->bi_parent = tb->FL[0];
@@ -633,8 +708,10 @@ static void leaf_define_dest_src_infos(int shift_mode, struct tree_balance *tb,
shift_mode, src_bi->bi_bh, dest_bi->bi_bh);
}
-/* copy mov_num items and mov_bytes of the (mov_num-1)th item to
- neighbor. Delete them from source */
+/*
+ * copy mov_num items and mov_bytes of the (mov_num-1)th item to
+ * neighbor. Delete them from source
+ */
int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num,
int mov_bytes, struct buffer_head *Snew)
{
@@ -657,18 +734,24 @@ int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num,
return ret_value;
}
-/* Shift shift_num items (and shift_bytes of last shifted item if shift_bytes != -1)
- from S[0] to L[0] and replace the delimiting key */
+/*
+ * Shift shift_num items (and shift_bytes of last shifted item if
+ * shift_bytes != -1) from S[0] to L[0] and replace the delimiting key
+ */
int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes)
{
struct buffer_head *S0 = PATH_PLAST_BUFFER(tb->tb_path);
int i;
- /* move shift_num (and shift_bytes bytes) items from S[0] to left neighbor L[0] */
+ /*
+ * move shift_num (and shift_bytes bytes) items from S[0]
+ * to left neighbor L[0]
+ */
i = leaf_move_items(LEAF_FROM_S_TO_L, tb, shift_num, shift_bytes, NULL);
if (shift_num) {
- if (B_NR_ITEMS(S0) == 0) { /* number of items in S[0] == 0 */
+ /* number of items in S[0] == 0 */
+ if (B_NR_ITEMS(S0) == 0) {
RFALSE(shift_bytes != -1,
"vs-10270: S0 is empty now, but shift_bytes != -1 (%d)",
@@ -691,10 +774,10 @@ int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes)
replace_key(tb, tb->CFL[0], tb->lkey[0], S0, 0);
RFALSE((shift_bytes != -1 &&
- !(is_direntry_le_ih(B_N_PITEM_HEAD(S0, 0))
- && !I_ENTRY_COUNT(B_N_PITEM_HEAD(S0, 0)))) &&
+ !(is_direntry_le_ih(item_head(S0, 0))
+ && !ih_entry_count(item_head(S0, 0)))) &&
(!op_is_left_mergeable
- (B_N_PKEY(S0, 0), S0->b_size)),
+ (leaf_key(S0, 0), S0->b_size)),
"vs-10280: item must be mergeable");
}
}
@@ -704,13 +787,18 @@ int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes)
/* CLEANING STOPPED HERE */
-/* Shift shift_num (shift_bytes) items from S[0] to the right neighbor, and replace the delimiting key */
+/*
+ * Shift shift_num (shift_bytes) items from S[0] to the right neighbor,
+ * and replace the delimiting key
+ */
int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes)
{
- // struct buffer_head * S0 = PATH_PLAST_BUFFER (tb->tb_path);
int ret_value;
- /* move shift_num (and shift_bytes) items from S[0] to right neighbor R[0] */
+ /*
+ * move shift_num (and shift_bytes) items from S[0] to
+ * right neighbor R[0]
+ */
ret_value =
leaf_move_items(LEAF_FROM_S_TO_R, tb, shift_num, shift_bytes, NULL);
@@ -725,12 +813,16 @@ int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes)
static void leaf_delete_items_entirely(struct buffer_info *bi,
int first, int del_num);
-/* If del_bytes == -1, starting from position 'first' delete del_num items in whole in buffer CUR.
- If not.
- If last_first == 0. Starting from position 'first' delete del_num-1 items in whole. Delete part of body of
- the first item. Part defined by del_bytes. Don't delete first item header
- If last_first == 1. Starting from position 'first+1' delete del_num-1 items in whole. Delete part of body of
- the last item . Part defined by del_bytes. Don't delete last item header.
+/*
+ * If del_bytes == -1, starting from position 'first' delete del_num
+ * items in whole in buffer CUR.
+ * If not.
+ * If last_first == 0. Starting from position 'first' delete del_num-1
+ * items in whole. Delete part of body of the first item. Part defined by
+ * del_bytes. Don't delete first item header
+ * If last_first == 1. Starting from position 'first+1' delete del_num-1
+ * items in whole. Delete part of body of the last item . Part defined by
+ * del_bytes. Don't delete last item header.
*/
void leaf_delete_items(struct buffer_info *cur_bi, int last_first,
int first, int del_num, int del_bytes)
@@ -761,32 +853,43 @@ void leaf_delete_items(struct buffer_info *cur_bi, int last_first,
leaf_delete_items_entirely(cur_bi, first, del_num);
else {
if (last_first == FIRST_TO_LAST) {
- /* delete del_num-1 items beginning from item in position first */
+ /*
+ * delete del_num-1 items beginning from
+ * item in position first
+ */
leaf_delete_items_entirely(cur_bi, first, del_num - 1);
- /* delete the part of the first item of the bh
- do not delete item header
+ /*
+ * delete the part of the first item of the bh
+ * do not delete item header
*/
leaf_cut_from_buffer(cur_bi, 0, 0, del_bytes);
} else {
struct item_head *ih;
int len;
- /* delete del_num-1 items beginning from item in position first+1 */
+ /*
+ * delete del_num-1 items beginning from
+ * item in position first+1
+ */
leaf_delete_items_entirely(cur_bi, first + 1,
del_num - 1);
- ih = B_N_PITEM_HEAD(bh, B_NR_ITEMS(bh) - 1);
+ ih = item_head(bh, B_NR_ITEMS(bh) - 1);
if (is_direntry_le_ih(ih))
/* the last item is directory */
- /* len = numbers of directory entries in this item */
+ /*
+ * len = numbers of directory entries
+ * in this item
+ */
len = ih_entry_count(ih);
else
/* len = body len of item */
len = ih_item_len(ih);
- /* delete the part of the last item of the bh
- do not delete item header
+ /*
+ * delete the part of the last item of the bh
+ * do not delete item header
*/
leaf_cut_from_buffer(cur_bi, B_NR_ITEMS(bh) - 1,
len - del_bytes, del_bytes);
@@ -820,10 +923,10 @@ void leaf_insert_into_buf(struct buffer_info *bi, int before,
zeros_number, ih_item_len(inserted_item_ih));
/* get item new item must be inserted before */
- ih = B_N_PITEM_HEAD(bh, before);
+ ih = item_head(bh, before);
/* prepare space for the body of new item */
- last_loc = nr ? ih_location(&(ih[nr - before - 1])) : bh->b_size;
+ last_loc = nr ? ih_location(&ih[nr - before - 1]) : bh->b_size;
unmoved_loc = before ? ih_location(ih - 1) : bh->b_size;
memmove(bh->b_data + last_loc - ih_item_len(inserted_item_ih),
@@ -846,8 +949,8 @@ void leaf_insert_into_buf(struct buffer_info *bi, int before,
/* change locations */
for (i = before; i < nr + 1; i++) {
- unmoved_loc -= ih_item_len(&(ih[i - before]));
- put_ih_location(&(ih[i - before]), unmoved_loc);
+ unmoved_loc -= ih_item_len(&ih[i - before]);
+ put_ih_location(&ih[i - before], unmoved_loc);
}
/* sizes, free space, item number */
@@ -867,8 +970,10 @@ void leaf_insert_into_buf(struct buffer_info *bi, int before,
}
}
-/* paste paste_size bytes to affected_item_num-th item.
- When item is a directory, this only prepare space for new entries */
+/*
+ * paste paste_size bytes to affected_item_num-th item.
+ * When item is a directory, this only prepare space for new entries
+ */
void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num,
int pos_in_item, int paste_size,
const char *body, int zeros_number)
@@ -902,9 +1007,9 @@ void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num,
#endif /* CONFIG_REISERFS_CHECK */
/* item to be appended */
- ih = B_N_PITEM_HEAD(bh, affected_item_num);
+ ih = item_head(bh, affected_item_num);
- last_loc = ih_location(&(ih[nr - affected_item_num - 1]));
+ last_loc = ih_location(&ih[nr - affected_item_num - 1]);
unmoved_loc = affected_item_num ? ih_location(ih - 1) : bh->b_size;
/* prepare space */
@@ -913,8 +1018,8 @@ void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num,
/* change locations */
for (i = affected_item_num; i < nr; i++)
- put_ih_location(&(ih[i - affected_item_num]),
- ih_location(&(ih[i - affected_item_num])) -
+ put_ih_location(&ih[i - affected_item_num],
+ ih_location(&ih[i - affected_item_num]) -
paste_size);
if (body) {
@@ -957,10 +1062,12 @@ void leaf_paste_in_buffer(struct buffer_info *bi, int affected_item_num,
}
}
-/* cuts DEL_COUNT entries beginning from FROM-th entry. Directory item
- does not have free space, so it moves DEHs and remaining records as
- necessary. Return value is size of removed part of directory item
- in bytes. */
+/*
+ * cuts DEL_COUNT entries beginning from FROM-th entry. Directory item
+ * does not have free space, so it moves DEHs and remaining records as
+ * necessary. Return value is size of removed part of directory item
+ * in bytes.
+ */
static int leaf_cut_entries(struct buffer_head *bh,
struct item_head *ih, int from, int del_count)
{
@@ -971,12 +1078,14 @@ static int leaf_cut_entries(struct buffer_head *bh,
int cut_records_len; /* length of all removed records */
int i;
- /* make sure, that item is directory and there are enough entries to
- remove */
+ /*
+ * make sure that item is directory and there are enough entries to
+ * remove
+ */
RFALSE(!is_direntry_le_ih(ih), "10180: item is not directory item");
- RFALSE(I_ENTRY_COUNT(ih) < from + del_count,
+ RFALSE(ih_entry_count(ih) < from + del_count,
"10185: item contains not enough entries: entry_count = %d, from = %d, to delete = %d",
- I_ENTRY_COUNT(ih), from, del_count);
+ ih_entry_count(ih), from, del_count);
if (del_count == 0)
return 0;
@@ -987,22 +1096,24 @@ static int leaf_cut_entries(struct buffer_head *bh,
/* entry head array */
deh = B_I_DEH(bh, ih);
- /* first byte of remaining entries, those are BEFORE cut entries
- (prev_record) and length of all removed records (cut_records_len) */
+ /*
+ * first byte of remaining entries, those are BEFORE cut entries
+ * (prev_record) and length of all removed records (cut_records_len)
+ */
prev_record_offset =
- (from ? deh_location(&(deh[from - 1])) : ih_item_len(ih));
+ (from ? deh_location(&deh[from - 1]) : ih_item_len(ih));
cut_records_len = prev_record_offset /*from_record */ -
- deh_location(&(deh[from + del_count - 1]));
+ deh_location(&deh[from + del_count - 1]);
prev_record = item + prev_record_offset;
/* adjust locations of remaining entries */
- for (i = I_ENTRY_COUNT(ih) - 1; i > from + del_count - 1; i--)
- put_deh_location(&(deh[i]),
+ for (i = ih_entry_count(ih) - 1; i > from + del_count - 1; i--)
+ put_deh_location(&deh[i],
deh_location(&deh[i]) -
(DEH_SIZE * del_count));
for (i = 0; i < from; i++)
- put_deh_location(&(deh[i]),
+ put_deh_location(&deh[i],
deh_location(&deh[i]) - (DEH_SIZE * del_count +
cut_records_len));
@@ -1021,14 +1132,15 @@ static int leaf_cut_entries(struct buffer_head *bh,
return DEH_SIZE * del_count + cut_records_len;
}
-/* when cut item is part of regular file
- pos_in_item - first byte that must be cut
- cut_size - number of bytes to be cut beginning from pos_in_item
-
- when cut item is part of directory
- pos_in_item - number of first deleted entry
- cut_size - count of deleted entries
- */
+/*
+ * when cut item is part of regular file
+ * pos_in_item - first byte that must be cut
+ * cut_size - number of bytes to be cut beginning from pos_in_item
+ *
+ * when cut item is part of directory
+ * pos_in_item - number of first deleted entry
+ * cut_size - count of deleted entries
+ */
void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
int pos_in_item, int cut_size)
{
@@ -1043,7 +1155,7 @@ void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
nr = blkh_nr_item(blkh);
/* item head of truncated item */
- ih = B_N_PITEM_HEAD(bh, cut_item_num);
+ ih = item_head(bh, cut_item_num);
if (is_direntry_le_ih(ih)) {
/* first cut entry () */
@@ -1055,7 +1167,6 @@ void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
cut_item_num);
/* change item key by key of first entry in the item */
set_le_ih_k_offset(ih, deh_offset(B_I_DEH(bh, ih)));
- /*memcpy (&ih->ih_key.k_offset, &(B_I_DEH (bh, ih)->deh_offset), SHORT_KEY_SIZE); */
}
} else {
/* item is direct or indirect */
@@ -1089,7 +1200,7 @@ void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
}
/* location of the last item */
- last_loc = ih_location(&(ih[nr - cut_item_num - 1]));
+ last_loc = ih_location(&ih[nr - cut_item_num - 1]);
/* location of the item, which is remaining at the same place */
unmoved_loc = cut_item_num ? ih_location(ih - 1) : bh->b_size;
@@ -1108,7 +1219,7 @@ void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
/* change locations */
for (i = cut_item_num; i < nr; i++)
- put_ih_location(&(ih[i - cut_item_num]),
+ put_ih_location(&ih[i - cut_item_num],
ih_location(&ih[i - cut_item_num]) + cut_size);
/* size, free space */
@@ -1156,14 +1267,14 @@ static void leaf_delete_items_entirely(struct buffer_info *bi,
return;
}
- ih = B_N_PITEM_HEAD(bh, first);
+ ih = item_head(bh, first);
/* location of unmovable item */
j = (first == 0) ? bh->b_size : ih_location(ih - 1);
/* delete items */
- last_loc = ih_location(&(ih[nr - 1 - first]));
- last_removed_loc = ih_location(&(ih[del_num - 1]));
+ last_loc = ih_location(&ih[nr - 1 - first]);
+ last_removed_loc = ih_location(&ih[del_num - 1]);
memmove(bh->b_data + last_loc + j - last_removed_loc,
bh->b_data + last_loc, last_removed_loc - last_loc);
@@ -1173,8 +1284,8 @@ static void leaf_delete_items_entirely(struct buffer_info *bi,
/* change item location */
for (i = first; i < nr - del_num; i++)
- put_ih_location(&(ih[i - first]),
- ih_location(&(ih[i - first])) + (j -
+ put_ih_location(&ih[i - first],
+ ih_location(&ih[i - first]) + (j -
last_removed_loc));
/* sizes, item number */
@@ -1195,7 +1306,10 @@ static void leaf_delete_items_entirely(struct buffer_info *bi,
}
}
-/* paste new_entry_count entries (new_dehs, records) into position before to item_num-th item */
+/*
+ * paste new_entry_count entries (new_dehs, records) into position
+ * before to item_num-th item
+ */
void leaf_paste_entries(struct buffer_info *bi,
int item_num,
int before,
@@ -1213,13 +1327,16 @@ void leaf_paste_entries(struct buffer_info *bi,
if (new_entry_count == 0)
return;
- ih = B_N_PITEM_HEAD(bh, item_num);
+ ih = item_head(bh, item_num);
- /* make sure, that item is directory, and there are enough records in it */
+ /*
+ * make sure, that item is directory, and there are enough
+ * records in it
+ */
RFALSE(!is_direntry_le_ih(ih), "10225: item is not directory item");
- RFALSE(I_ENTRY_COUNT(ih) < before,
+ RFALSE(ih_entry_count(ih) < before,
"10230: there are no entry we paste entries before. entry_count = %d, before = %d",
- I_ENTRY_COUNT(ih), before);
+ ih_entry_count(ih), before);
/* first byte of dest item */
item = bh->b_data + ih_location(ih);
@@ -1230,21 +1347,21 @@ void leaf_paste_entries(struct buffer_info *bi,
/* new records will be pasted at this point */
insert_point =
item +
- (before ? deh_location(&(deh[before - 1]))
+ (before ? deh_location(&deh[before - 1])
: (ih_item_len(ih) - paste_size));
/* adjust locations of records that will be AFTER new records */
- for (i = I_ENTRY_COUNT(ih) - 1; i >= before; i--)
- put_deh_location(&(deh[i]),
- deh_location(&(deh[i])) +
+ for (i = ih_entry_count(ih) - 1; i >= before; i--)
+ put_deh_location(&deh[i],
+ deh_location(&deh[i]) +
(DEH_SIZE * new_entry_count));
/* adjust locations of records that will be BEFORE new records */
for (i = 0; i < before; i++)
- put_deh_location(&(deh[i]),
- deh_location(&(deh[i])) + paste_size);
+ put_deh_location(&deh[i],
+ deh_location(&deh[i]) + paste_size);
- old_entry_num = I_ENTRY_COUNT(ih);
+ old_entry_num = ih_entry_count(ih);
put_ih_entry_count(ih, ih_entry_count(ih) + new_entry_count);
/* prepare space for pasted records */
@@ -1266,10 +1383,10 @@ void leaf_paste_entries(struct buffer_info *bi,
/* set locations of new records */
for (i = 0; i < new_entry_count; i++) {
- put_deh_location(&(deh[i]),
- deh_location(&(deh[i])) +
+ put_deh_location(&deh[i],
+ deh_location(&deh[i]) +
(-deh_location
- (&(new_dehs[new_entry_count - 1])) +
+ (&new_dehs[new_entry_count - 1]) +
insert_point + DEH_SIZE * new_entry_count -
item));
}
@@ -1277,28 +1394,26 @@ void leaf_paste_entries(struct buffer_info *bi,
/* change item key if necessary (when we paste before 0-th entry */
if (!before) {
set_le_ih_k_offset(ih, deh_offset(new_dehs));
-/* memcpy (&ih->ih_key.k_offset,
- &new_dehs->deh_offset, SHORT_KEY_SIZE);*/
}
#ifdef CONFIG_REISERFS_CHECK
{
int prev, next;
/* check record locations */
deh = B_I_DEH(bh, ih);
- for (i = 0; i < I_ENTRY_COUNT(ih); i++) {
+ for (i = 0; i < ih_entry_count(ih); i++) {
next =
(i <
- I_ENTRY_COUNT(ih) -
- 1) ? deh_location(&(deh[i + 1])) : 0;
- prev = (i != 0) ? deh_location(&(deh[i - 1])) : 0;
+ ih_entry_count(ih) -
+ 1) ? deh_location(&deh[i + 1]) : 0;
+ prev = (i != 0) ? deh_location(&deh[i - 1]) : 0;
- if (prev && prev <= deh_location(&(deh[i])))
+ if (prev && prev <= deh_location(&deh[i]))
reiserfs_error(sb_from_bi(bi), "vs-10240",
"directory item (%h) "
"corrupted (prev %a, "
"cur(%d) %a)",
ih, deh + i - 1, i, deh + i);
- if (next && next >= deh_location(&(deh[i])))
+ if (next && next >= deh_location(&deh[i]))
reiserfs_error(sb_from_bi(bi), "vs-10250",
"directory item (%h) "
"corrupted (cur(%d) %a, "
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-28 02:47:35 +0300