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Diffstat (limited to 'fs/jfs/jfs_extent.c')
-rw-r--r--fs/jfs/jfs_extent.c178
1 files changed, 83 insertions, 95 deletions
diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c
index a35bdca6a80..2ae7d59ab10 100644
--- a/fs/jfs/jfs_extent.c
+++ b/fs/jfs/jfs_extent.c
@@ -34,8 +34,8 @@ static int extBrealloc(struct inode *, s64, s64, s64 *, s64 *);
#endif
static s64 extRoundDown(s64 nb);
-#define DPD(a) (printk("(a): %d\n",(a)))
-#define DPC(a) (printk("(a): %c\n",(a)))
+#define DPD(a) (printk("(a): %d\n",(a)))
+#define DPC(a) (printk("(a): %c\n",(a)))
#define DPL1(a) \
{ \
if ((a) >> 32) \
@@ -51,19 +51,19 @@ static s64 extRoundDown(s64 nb);
printk("(a): %x\n",(a) << 32); \
}
-#define DPD1(a) (printk("(a): %d ",(a)))
-#define DPX(a) (printk("(a): %08x\n",(a)))
-#define DPX1(a) (printk("(a): %08x ",(a)))
-#define DPS(a) (printk("%s\n",(a)))
-#define DPE(a) (printk("\nENTERING: %s\n",(a)))
-#define DPE1(a) (printk("\nENTERING: %s",(a)))
-#define DPS1(a) (printk(" %s ",(a)))
+#define DPD1(a) (printk("(a): %d ",(a)))
+#define DPX(a) (printk("(a): %08x\n",(a)))
+#define DPX1(a) (printk("(a): %08x ",(a)))
+#define DPS(a) (printk("%s\n",(a)))
+#define DPE(a) (printk("\nENTERING: %s\n",(a)))
+#define DPE1(a) (printk("\nENTERING: %s",(a)))
+#define DPS1(a) (printk(" %s ",(a)))
/*
* NAME: extAlloc()
*
- * FUNCTION: allocate an extent for a specified page range within a
+ * FUNCTION: allocate an extent for a specified page range within a
* file.
*
* PARAMETERS:
@@ -78,9 +78,9 @@ static s64 extRoundDown(s64 nb);
* should be marked as allocated but not recorded.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error.
- * -ENOSPC - insufficient disk resources.
+ * 0 - success
+ * -EIO - i/o error.
+ * -ENOSPC - insufficient disk resources.
*/
int
extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
@@ -126,7 +126,7 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
/* allocate the disk blocks for the extent. initially, extBalloc()
* will try to allocate disk blocks for the requested size (xlen).
- * if this fails (xlen contiguous free blocks not avaliable), it'll
+ * if this fails (xlen contiguous free blocks not available), it'll
* try to allocate a smaller number of blocks (producing a smaller
* extent), with this smaller number of blocks consisting of the
* requested number of blocks rounded down to the next smaller
@@ -141,10 +141,11 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
}
/* Allocate blocks to quota. */
- if (DQUOT_ALLOC_BLOCK(ip, nxlen)) {
+ rc = dquot_alloc_block(ip, nxlen);
+ if (rc) {
dbFree(ip, nxaddr, (s64) nxlen);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
- return -EDQUOT;
+ return rc;
}
/* determine the value of the extent flag */
@@ -164,7 +165,7 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
*/
if (rc) {
dbFree(ip, nxaddr, nxlen);
- DQUOT_FREE_BLOCK(ip, nxlen);
+ dquot_free_block(ip, nxlen);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
return (rc);
}
@@ -192,9 +193,9 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
#ifdef _NOTYET
/*
- * NAME: extRealloc()
+ * NAME: extRealloc()
*
- * FUNCTION: extend the allocation of a file extent containing a
+ * FUNCTION: extend the allocation of a file extent containing a
* partial back last page.
*
* PARAMETERS:
@@ -207,9 +208,9 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
* should be marked as allocated but not recorded.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error.
- * -ENOSPC - insufficient disk resources.
+ * 0 - success
+ * -EIO - i/o error.
+ * -ENOSPC - insufficient disk resources.
*/
int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
{
@@ -256,10 +257,11 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
goto exit;
/* Allocat blocks to quota. */
- if (DQUOT_ALLOC_BLOCK(ip, nxlen)) {
+ rc = dquot_alloc_block(ip, nxlen);
+ if (rc) {
dbFree(ip, nxaddr, (s64) nxlen);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
- return -EDQUOT;
+ return rc;
}
delta = nxlen - xlen;
@@ -297,7 +299,7 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
/* extend the extent */
if ((rc = xtExtend(0, ip, xoff + xlen, (int) nextend, 0))) {
dbFree(ip, xaddr + xlen, delta);
- DQUOT_FREE_BLOCK(ip, nxlen);
+ dquot_free_block(ip, nxlen);
goto exit;
}
} else {
@@ -308,7 +310,7 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
*/
if ((rc = xtTailgate(0, ip, xoff, (int) ntail, nxaddr, 0))) {
dbFree(ip, nxaddr, nxlen);
- DQUOT_FREE_BLOCK(ip, nxlen);
+ dquot_free_block(ip, nxlen);
goto exit;
}
}
@@ -345,9 +347,9 @@ exit:
/*
- * NAME: extHint()
+ * NAME: extHint()
*
- * FUNCTION: produce an extent allocation hint for a file offset.
+ * FUNCTION: produce an extent allocation hint for a file offset.
*
* PARAMETERS:
* ip - the inode of the file.
@@ -356,17 +358,18 @@ exit:
* the hint.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error.
+ * 0 - success
+ * -EIO - i/o error.
*/
int extHint(struct inode *ip, s64 offset, xad_t * xp)
{
struct super_block *sb = ip->i_sb;
- struct xadlist xadl;
- struct lxdlist lxdl;
- lxd_t lxd;
+ int nbperpage = JFS_SBI(sb)->nbperpage;
s64 prev;
- int rc, nbperpage = JFS_SBI(sb)->nbperpage;
+ int rc = 0;
+ s64 xaddr;
+ int xlen;
+ int xflag;
/* init the hint as "no hint provided" */
XADaddress(xp, 0);
@@ -376,62 +379,47 @@ int extHint(struct inode *ip, s64 offset, xad_t * xp)
*/
prev = ((offset & ~POFFSET) >> JFS_SBI(sb)->l2bsize) - nbperpage;
- /* if the offsets in the first page of the file,
- * no hint provided.
+ /* if the offset is in the first page of the file, no hint provided.
*/
if (prev < 0)
- return (0);
+ goto out;
- /* prepare to lookup the previous page's extent info */
- lxdl.maxnlxd = 1;
- lxdl.nlxd = 1;
- lxdl.lxd = &lxd;
- LXDoffset(&lxd, prev)
- LXDlength(&lxd, nbperpage);
+ rc = xtLookup(ip, prev, nbperpage, &xflag, &xaddr, &xlen, 0);
- xadl.maxnxad = 1;
- xadl.nxad = 0;
- xadl.xad = xp;
-
- /* perform the lookup */
- if ((rc = xtLookupList(ip, &lxdl, &xadl, 0)))
- return (rc);
-
- /* check if not extent exists for the previous page.
- * this is possible for sparse files.
- */
- if (xadl.nxad == 0) {
-// assert(ISSPARSE(ip));
- return (0);
- }
-
- /* only preserve the abnr flag within the xad flags
- * of the returned hint.
- */
- xp->flag &= XAD_NOTRECORDED;
-
- if(xadl.nxad != 1 || lengthXAD(xp) != nbperpage) {
- jfs_error(ip->i_sb, "extHint: corrupt xtree");
- return -EIO;
- }
+ if ((rc == 0) && xlen) {
+ if (xlen != nbperpage) {
+ jfs_error(ip->i_sb, "corrupt xtree\n");
+ rc = -EIO;
+ }
+ XADaddress(xp, xaddr);
+ XADlength(xp, xlen);
+ XADoffset(xp, prev);
+ /*
+ * only preserve the abnr flag within the xad flags
+ * of the returned hint.
+ */
+ xp->flag = xflag & XAD_NOTRECORDED;
+ } else
+ rc = 0;
- return (0);
+out:
+ return (rc);
}
/*
- * NAME: extRecord()
+ * NAME: extRecord()
*
- * FUNCTION: change a page with a file from not recorded to recorded.
+ * FUNCTION: change a page with a file from not recorded to recorded.
*
* PARAMETERS:
* ip - inode of the file.
* cp - cbuf of the file page.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error.
- * -ENOSPC - insufficient disk resources.
+ * 0 - success
+ * -EIO - i/o error.
+ * -ENOSPC - insufficient disk resources.
*/
int extRecord(struct inode *ip, xad_t * xp)
{
@@ -451,9 +439,9 @@ int extRecord(struct inode *ip, xad_t * xp)
#ifdef _NOTYET
/*
- * NAME: extFill()
+ * NAME: extFill()
*
- * FUNCTION: allocate disk space for a file page that represents
+ * FUNCTION: allocate disk space for a file page that represents
* a file hole.
*
* PARAMETERS:
@@ -461,16 +449,16 @@ int extRecord(struct inode *ip, xad_t * xp)
* cp - cbuf of the file page represent the hole.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error.
- * -ENOSPC - insufficient disk resources.
+ * 0 - success
+ * -EIO - i/o error.
+ * -ENOSPC - insufficient disk resources.
*/
int extFill(struct inode *ip, xad_t * xp)
{
int rc, nbperpage = JFS_SBI(ip->i_sb)->nbperpage;
s64 blkno = offsetXAD(xp) >> ip->i_blkbits;
-// assert(ISSPARSE(ip));
+// assert(ISSPARSE(ip));
/* initialize the extent allocation hint */
XADaddress(xp, 0);
@@ -489,11 +477,11 @@ int extFill(struct inode *ip, xad_t * xp)
/*
* NAME: extBalloc()
*
- * FUNCTION: allocate disk blocks to form an extent.
+ * FUNCTION: allocate disk blocks to form an extent.
*
* initially, we will try to allocate disk blocks for the
* requested size (nblocks). if this fails (nblocks
- * contiguous free blocks not avaliable), we'll try to allocate
+ * contiguous free blocks not available), we'll try to allocate
* a smaller number of blocks (producing a smaller extent), with
* this smaller number of blocks consisting of the requested
* number of blocks rounded down to the next smaller power of 2
@@ -513,9 +501,9 @@ int extFill(struct inode *ip, xad_t * xp)
* allocated block range.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error.
- * -ENOSPC - insufficient disk resources.
+ * 0 - success
+ * -EIO - i/o error.
+ * -ENOSPC - insufficient disk resources.
*/
static int
extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
@@ -580,14 +568,14 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
/*
* NAME: extBrealloc()
*
- * FUNCTION: attempt to extend an extent's allocation.
+ * FUNCTION: attempt to extend an extent's allocation.
*
* Initially, we will try to extend the extent's allocation
* in place. If this fails, we'll try to move the extent
* to a new set of blocks. If moving the extent, we initially
* will try to allocate disk blocks for the requested size
* (newnblks). if this fails (new contiguous free blocks not
- * avaliable), we'll try to allocate a smaller number of
+ * available), we'll try to allocate a smaller number of
* blocks (producing a smaller extent), with this smaller
* number of blocks consisting of the requested number of
* blocks rounded down to the next smaller power of 2
@@ -597,8 +585,8 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
*
* PARAMETERS:
* ip - the inode of the file.
- * blkno - starting block number of the extents current allocation.
- * nblks - number of blocks within the extents current allocation.
+ * blkno - starting block number of the extents current allocation.
+ * nblks - number of blocks within the extents current allocation.
* newnblks - pointer to a s64 value. on entry, this value is the
* the new desired extent size (number of blocks). on
* successful exit, this value is set to the extent's actual
@@ -606,9 +594,9 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
* newblkno - the starting block number of the extents new allocation.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error.
- * -ENOSPC - insufficient disk resources.
+ * 0 - success
+ * -EIO - i/o error.
+ * -ENOSPC - insufficient disk resources.
*/
static int
extBrealloc(struct inode *ip,
@@ -634,16 +622,16 @@ extBrealloc(struct inode *ip,
/*
- * NAME: extRoundDown()
+ * NAME: extRoundDown()
*
- * FUNCTION: round down a specified number of blocks to the next
+ * FUNCTION: round down a specified number of blocks to the next
* smallest power of 2 number.
*
* PARAMETERS:
* nb - the inode of the file.
*
* RETURN VALUES:
- * next smallest power of 2 number.
+ * next smallest power of 2 number.
*/
static s64 extRoundDown(s64 nb)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-14 20:02:02 +0000