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jfs: define xtree root and page independently

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In order to make array bounds checking sane, provide a separate
definition of the in-inode xtree root and the external xtree page.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Tested-by: Manas Ghandat <ghandatmanas@gmail.com>
This commit is contained in:
Dave Kleikamp 2023-10-05 09:16:14 -05:00
parent 05d9ea1ceb
commit a779ed754e
6 changed files with 32 additions and 23 deletions
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2
fs/jfs/jfs_dinode.h
View File

@ -96,7 +96,7 @@ struct dinode {
#define di_gengen u._file._u1._imap._gengen
union {
xtpage_t _xtroot;
xtroot_t _xtroot;
struct {
u8 unused[16]; /* 16: */
dxd_t _dxd; /* 16: */

6
fs/jfs/jfs_imap.c
View File

@ -670,7 +670,7 @@ int diWrite(tid_t tid, struct inode *ip)
* This is the special xtree inside the directory for storing
* the directory table
*/
xtpage_t *p, *xp;
xtroot_t *p, *xp;
xad_t *xad;
jfs_ip->xtlid = 0;
@ -684,7 +684,7 @@ int diWrite(tid_t tid, struct inode *ip)
* copy xtree root from inode to dinode:
*/
p = &jfs_ip->i_xtroot;
xp = (xtpage_t *) &dp->di_dirtable;
xp = (xtroot_t *) &dp->di_dirtable;
lv = ilinelock->lv;
for (n = 0; n < ilinelock->index; n++, lv++) {
memcpy(&xp->xad[lv->offset], &p->xad[lv->offset],
@ -713,7 +713,7 @@ int diWrite(tid_t tid, struct inode *ip)
* regular file: 16 byte (XAD slot) granularity
*/
if (type & tlckXTREE) {
xtpage_t *p, *xp;
xtroot_t *p, *xp;
xad_t *xad;
/*

2
fs/jfs/jfs_incore.h
View File

@ -66,7 +66,7 @@ struct jfs_inode_info {
lid_t xtlid; /* lid of xtree lock on directory */
union {
struct {
xtpage_t _xtroot; /* 288: xtree root */
xtroot_t _xtroot; /* 288: xtree root */
struct inomap *_imap; /* 4: inode map header */
} file;
struct {

4
fs/jfs/jfs_txnmgr.c
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@ -783,7 +783,7 @@ struct tlock *txLock(tid_t tid, struct inode *ip, struct metapage * mp,
if (mp->xflag & COMMIT_PAGE)
p = (xtpage_t *) mp->data;
else
p = &jfs_ip->i_xtroot;
p = (xtpage_t *) &jfs_ip->i_xtroot;
xtlck->lwm.offset =
le16_to_cpu(p->header.nextindex);
}
@ -1676,7 +1676,7 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
if (tlck->type & tlckBTROOT) {
lrd->log.redopage.type |= cpu_to_le16(LOG_BTROOT);
p = &JFS_IP(ip)->i_xtroot;
p = (xtpage_t *) &JFS_IP(ip)->i_xtroot;
if (S_ISDIR(ip->i_mode))
lrd->log.redopage.type |=
cpu_to_le16(LOG_DIR_XTREE);

4
fs/jfs/jfs_xtree.c
View File

@ -1213,7 +1213,7 @@ xtSplitRoot(tid_t tid,
struct xtlock *xtlck;
int rc;
sp = &JFS_IP(ip)->i_xtroot;
sp = (xtpage_t *) &JFS_IP(ip)->i_xtroot;
INCREMENT(xtStat.split);
@ -2098,7 +2098,7 @@ int xtAppend(tid_t tid, /* transaction id */
*/
void xtInitRoot(tid_t tid, struct inode *ip)
{
xtpage_t *p;
xtroot_t *p;
/*
* acquire a transaction lock on the root

37
fs/jfs/jfs_xtree.h
View File

@ -65,24 +65,33 @@ struct xadlist {
#define XTPAGEMAXSLOT 256
#define XTENTRYSTART 2
struct xtheader {
__le64 next; /* 8: */
__le64 prev; /* 8: */
u8 flag; /* 1: */
u8 rsrvd1; /* 1: */
__le16 nextindex; /* 2: next index = number of entries */
__le16 maxentry; /* 2: max number of entries */
__le16 rsrvd2; /* 2: */
pxd_t self; /* 8: self */
};
/*
* xtree root (in inode):
*/
typedef union {
struct xtheader header;
xad_t xad[XTROOTMAXSLOT]; /* 16 * maxentry: xad array */
} xtroot_t;
/*
* xtree page:
*/
typedef union {
struct xtheader {
__le64 next; /* 8: */
__le64 prev; /* 8: */
u8 flag; /* 1: */
u8 rsrvd1; /* 1: */
__le16 nextindex; /* 2: next index = number of entries */
__le16 maxentry; /* 2: max number of entries */
__le16 rsrvd2; /* 2: */
pxd_t self; /* 8: self */
} header; /* (32) */
xad_t xad[XTROOTMAXSLOT]; /* 16 * maxentry: xad array */
struct xtheader header;
xad_t xad[XTPAGEMAXSLOT]; /* 16 * maxentry: xad array */
} xtpage_t;
/*