release_metapage(*mp);
*mp = NULL;
}
- if (*mp == 0) {
+ if (!(*mp)) {
*lblock = blkno;
*mp = read_index_page(ip, blkno);
}
- if (*mp == 0) {
+ if (!(*mp)) {
jfs_err("free_index: error reading directory table");
return NULL;
}
lv = &llck->lv[llck->index];
/*
- * Linelock slot size is twice the size of directory table
- * slot size. 512 entries per page.
+ * Linelock slot size is twice the size of directory table
+ * slot size. 512 entries per page.
*/
lv->offset = ((index - 2) & 511) >> 1;
lv->length = 1;
}
ip->i_size = PSIZE;
- if ((mp = get_index_page(ip, 0)) == 0) {
+ mp = get_index_page(ip, 0);
+ if (!mp) {
jfs_err("add_index: get_metapage failed!");
xtTruncate(tid, ip, 0, COMMIT_PWMAP);
memcpy(&jfs_ip->i_dirtable, temp_table,
} else
mp = read_index_page(ip, blkno);
- if (mp == 0) {
+ if (!mp) {
jfs_err("add_index: get/read_metapage failed!");
goto clean_up;
}
dirtab_slot = find_index(ip, index, &mp, &lblock);
- if (dirtab_slot == 0)
+ if (!dirtab_slot)
return;
dirtab_slot->flag = DIR_INDEX_FREE;
* Changes an entry in the directory index table
*/
static void modify_index(tid_t tid, struct inode *ip, u32 index, s64 bn,
- int slot, struct metapage ** mp, u64 *lblock)
+ int slot, struct metapage ** mp, s64 *lblock)
{
struct dir_table_slot *dirtab_slot;
dirtab_slot = find_index(ip, index, mp, lblock);
- if (dirtab_slot == 0)
+ if (!dirtab_slot)
return;
DTSaddress(dirtab_slot, bn);
struct dir_table_slot *slot;
slot = find_index(ip, index, &mp, &lblock);
- if (slot == 0) {
+ if (!slot) {
return -EIO;
}
struct component_name ciKey;
struct super_block *sb = ip->i_sb;
- ciKey.name =
- (wchar_t *) kmalloc((JFS_NAME_MAX + 1) * sizeof(wchar_t),
- GFP_NOFS);
- if (ciKey.name == 0) {
+ ciKey.name = kmalloc((JFS_NAME_MAX + 1) * sizeof(wchar_t), GFP_NOFS);
+ if (!ciKey.name) {
rc = -ENOMEM;
goto dtSearch_Exit2;
}
btstack->nsplit = 1;
/*
- * search down tree from root:
+ * search down tree from root:
*
* between two consecutive entries of <Ki, Pi> and <Kj, Pj> of
* internal page, child page Pi contains entry with k, Ki <= K < Kj.
}
if (cmp == 0) {
/*
- * search hit
+ * search hit
*/
/* search hit - leaf page:
* return the entry found
}
/*
- * search miss
+ * search miss
*
* base is the smallest index with key (Kj) greater than
* search key (K) and may be zero or (maxindex + 1) index.
getChild:
/* update max. number of pages to split */
if (BT_STACK_FULL(btstack)) {
- /* Something's corrupted, mark filesytem dirty so
+ /* Something's corrupted, mark filesystem dirty so
* chkdsk will fix it.
*/
jfs_error(sb, "stack overrun in dtSearch!");
struct lv *lv;
/*
- * retrieve search result
+ * retrieve search result
*
* dtSearch() returns (leaf page pinned, index at which to insert).
* n.b. dtSearch() may return index of (maxindex + 1) of
DT_GETSEARCH(ip, btstack->top, bn, mp, p, index);
/*
- * insert entry for new key
+ * insert entry for new key
*/
if (DO_INDEX(ip)) {
if (JFS_IP(ip)->next_index == DIREND) {
data.leaf.ino = *fsn;
/*
- * leaf page does not have enough room for new entry:
+ * leaf page does not have enough room for new entry:
*
- * extend/split the leaf page;
+ * extend/split the leaf page;
*
* dtSplitUp() will insert the entry and unpin the leaf page.
*/
}
/*
- * leaf page does have enough room for new entry:
+ * leaf page does have enough room for new entry:
*
- * insert the new data entry into the leaf page;
+ * insert the new data entry into the leaf page;
*/
BT_MARK_DIRTY(mp, ip);
/*
smp = split->mp;
sp = DT_PAGE(ip, smp);
- key.name =
- (wchar_t *) kmalloc((JFS_NAME_MAX + 2) * sizeof(wchar_t),
- GFP_NOFS);
- if (key.name == 0) {
+ key.name = kmalloc((JFS_NAME_MAX + 2) * sizeof(wchar_t), GFP_NOFS);
+ if (!key.name) {
DT_PUTPAGE(smp);
rc = -ENOMEM;
goto dtSplitUp_Exit;
}
/*
- * split leaf page
+ * split leaf page
*
* The split routines insert the new entry, and
* acquire txLock as appropriate.
*/
/*
- * split root leaf page:
+ * split root leaf page:
*/
if (sp->header.flag & BT_ROOT) {
/*
}
/*
- * extend first leaf page
+ * extend first leaf page
*
* extend the 1st extent if less than buffer page size
* (dtExtendPage() reurns leaf page unpinned)
}
/*
- * split leaf page <sp> into <sp> and a new right page <rp>.
+ * split leaf page <sp> into <sp> and a new right page <rp>.
*
* return <rp> pinned and its extent descriptor <rpxd>
*/
rp->header.freecnt = rp->header.maxslot - fsi;
/*
- * sequential append at tail: append without split
+ * sequential append at tail: append without split
*
* If splitting the last page on a level because of appending
* a entry to it (skip is maxentry), it's likely that the access is
}
/*
- * non-sequential insert (at possibly middle page)
+ * non-sequential insert (at possibly middle page)
*/
/*
left = 0;
/*
- * compute fill factor for split pages
+ * compute fill factor for split pages
*
* <nxt> traces the next entry to move to rp
* <off> traces the next entry to stay in sp
/* <nxt> poins to the 1st entry to move */
/*
- * move entries to right page
+ * move entries to right page
*
* dtMoveEntry() initializes rp and reserves entry for insertion
*
return (rc);
/*
- * extend the extent
+ * extend the extent
*/
pxdlist = split->pxdlist;
pxd = &pxdlist->pxd[pxdlist->npxd];
}
/*
- * extend the page
+ * extend the page
*/
sp->header.self = *pxd;
/* update buffer extent descriptor of extended page */
xlen = lengthPXD(pxd);
xsize = xlen << JFS_SBI(sb)->l2bsize;
-#ifdef _STILL_TO_PORT
- bmSetXD(smp, xaddr, xsize);
-#endif /* _STILL_TO_PORT */
/*
* copy old stbl to new stbl at start of extended area
}
/*
- * update parent entry on the parent/root page
+ * update parent entry on the parent/root page
*/
/*
* acquire a transaction lock on the parent/root page
sp = &JFS_IP(ip)->i_dtroot;
/*
- * allocate/initialize a single (right) child page
+ * allocate/initialize a single (right) child page
*
* N.B. at first split, a one (or two) block to fit new entry
* is allocated; at subsequent split, a full page is allocated;
rp->header.prev = 0;
/*
- * move in-line root page into new right page extent
+ * move in-line root page into new right page extent
*/
/* linelock header + copied entries + new stbl (1st slot) in new page */
ASSERT(dtlck->index == 0);
dtInsertEntry(rp, split->index, split->key, split->data, &dtlck);
/*
- * reset parent/root page
+ * reset parent/root page
*
* set the 1st entry offset to 0, which force the left-most key
* at any level of the tree to be less than any search key.
dtpage_t *np;
/*
- * search for the entry to delete:
+ * search for the entry to delete:
*
* dtSearch() returns (leaf page pinned, index at which to delete).
*/
int i;
/*
- * keep the root leaf page which has become empty
+ * keep the root leaf page which has become empty
*/
if (BT_IS_ROOT(fmp)) {
/*
}
/*
- * free the non-root leaf page
+ * free the non-root leaf page
*/
/*
* acquire a transaction lock on the page
discard_metapage(fmp);
/*
- * propagate page deletion up the directory tree
+ * propagate page deletion up the directory tree
*
* If the delete from the parent page makes it empty,
* continue all the way up the tree.
#ifdef _NOTYET
/*
- * NAME: dtRelocate()
+ * NAME: dtRelocate()
*
- * FUNCTION: relocate dtpage (internal or leaf) of directory;
- * This function is mainly used by defragfs utility.
+ * FUNCTION: relocate dtpage (internal or leaf) of directory;
+ * This function is mainly used by defragfs utility.
*/
int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
s64 nxaddr)
xlen);
/*
- * 1. get the internal parent dtpage covering
- * router entry for the tartget page to be relocated;
+ * 1. get the internal parent dtpage covering
+ * router entry for the tartget page to be relocated;
*/
rc = dtSearchNode(ip, lmxaddr, opxd, &btstack);
if (rc)
jfs_info("dtRelocate: parent router entry validated.");
/*
- * 2. relocate the target dtpage
+ * 2. relocate the target dtpage
*/
/* read in the target page from src extent */
DT_GETPAGE(ip, oxaddr, mp, PSIZE, p, rc);
/* update the buffer extent descriptor of the dtpage */
xsize = xlen << JFS_SBI(ip->i_sb)->l2bsize;
-#ifdef _STILL_TO_PORT
- bmSetXD(mp, nxaddr, xsize);
-#endif /* _STILL_TO_PORT */
+
/* unpin the relocated page */
DT_PUTPAGE(mp);
jfs_info("dtRelocate: target dtpage relocated.");
*/
/*
- * 3. acquire maplock for the source extent to be freed;
+ * 3. acquire maplock for the source extent to be freed;
*/
/* for dtpage relocation, write a LOG_NOREDOPAGE record
* for the source dtpage (logredo() will init NoRedoPage
pxdlock->index = 1;
/*
- * 4. update the parent router entry for relocation;
+ * 4. update the parent router entry for relocation;
*
* acquire tlck for the parent entry covering the target dtpage;
* write LOG_REDOPAGE to apply after image only;
* NAME: dtSearchNode()
*
* FUNCTION: Search for an dtpage containing a specified address
- * This function is mainly used by defragfs utility.
+ * This function is mainly used by defragfs utility.
*
* NOTE: Search result on stack, the found page is pinned at exit.
* The result page must be an internal dtpage.
BT_CLR(btstack); /* reset stack */
/*
- * descend tree to the level with specified leftmost page
+ * descend tree to the level with specified leftmost page
*
* by convention, root bn = 0.
*/
}
/*
- * search each page at the current levevl
+ * search each page at the current levevl
*/
loop:
stbl = DT_GETSTBL(p);
if (DO_INDEX(ip)) {
/*
* persistent index is stored in directory entries.
- * Special cases: 0 = .
- * 1 = ..
- * -1 = End of directory
+ * Special cases: 0 = .
+ * 1 = ..
+ * -1 = End of directory
*/
do_index = 1;
/*
* Legacy filesystem - OS/2 & Linux JFS < 0.3.6
*
- * pn = index = 0: First entry "."
- * pn = 0; index = 1: Second entry ".."
- * pn > 0: Real entries, pn=1 -> leftmost page
- * pn = index = -1: No more entries
+ * pn = index = 0: First entry "."
+ * pn = 0; index = 1: Second entry ".."
+ * pn > 0: Real entries, pn=1 -> leftmost page
+ * pn = index = -1: No more entries
*/
dtpos = filp->f_pos;
if (dtpos == 0) {
BT_CLR(btstack); /* reset stack */
/*
- * descend leftmost path of the tree
+ * descend leftmost path of the tree
*
* by convention, root bn = 0.
*/
struct ldtentry *entry;
/*
- * search for the entry to modify:
+ * search for the entry to modify:
*
* dtSearch() returns (leaf page pinned, index at which to modify).
*/