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Kernel
提交 ffd14285 编写于 作者: L Linus Torvalds
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6:
  jfs: needs crc32_le
  jfs: Fix error handling in metapage_writepage()
  jfs: return f_fsid for statfs(2)
  jfs: remove xtLookupList()
  jfs: clean up a dangling comment
上级 0d34fb8e c68a65da
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Showing with 46 addition and 344 deletion
fs/jfs/Kconfig
浏览文件 @ ffd14285
config JFS_FS
tristate "JFS filesystem support"
select NLS
select CRC32
help
This is a port of IBM's Journaled Filesystem . More information is
available in the file <file:Documentation/filesystems/jfs.txt>.
......
fs/jfs/jfs_extent.c
浏览文件 @ ffd14285
......@@ -362,11 +362,12 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
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);
......@@ -376,46 +377,30 @@ 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);
/* prepare to lookup the previous page's extent info */
lxdl.maxnlxd = 1;
lxdl.nlxd = 1;
lxdl.lxd = &lxd;
LXDoffset(&lxd, prev)
LXDlength(&lxd, nbperpage);
xadl.maxnxad = 1;
xadl.nxad = 0;
xadl.xad = xp;
/* perform the lookup */
if ((rc = xtLookupList(ip, &lxdl, &xadl, 0)))
return (rc);
/* check if no extent exists for the previous page.
* this is possible for sparse files.
*/
if (xadl.nxad == 0) {
// assert(ISSPARSE(ip));
return (0);
}
goto out;
/* only preserve the abnr flag within the xad flags
* of the returned hint.
*/
xp->flag &= XAD_NOTRECORDED;
rc = xtLookup(ip, prev, nbperpage, &xflag, &xaddr, &xlen, 0);
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, "extHint: corrupt xtree");
rc = -EIO;
}
XADaddress(xp, xaddr);
XADlength(xp, xlen);
/*
* 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);
}
......
fs/jfs/jfs_imap.c
浏览文件 @ ffd14285
......@@ -56,12 +56,6 @@
#include "jfs_superblock.h"
#include "jfs_debug.h"
/*
* __mark_inode_dirty expects inodes to be hashed. Since we don't want
* special inodes in the fileset inode space, we make them appear hashed,
* but do not put on any lists.
*/
/*
* imap locks
*/
......@@ -497,7 +491,9 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)
release_metapage(mp);
/*
* that will look hashed, but won't be on any list; hlist_del()
* __mark_inode_dirty expects inodes to be hashed. Since we don't
* want special inodes in the fileset inode space, we make them
* appear hashed, but do not put on any lists. hlist_del()
* will work fine and require no locking.
*/
ip->i_hash.pprev = &ip->i_hash.next;
......
fs/jfs/jfs_metapage.c
浏览文件 @ ffd14285
......@@ -369,6 +369,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
unsigned long bio_bytes = 0;
unsigned long bio_offset = 0;
int offset;
int bad_blocks = 0;
page_start = (sector_t)page->index <<
(PAGE_CACHE_SHIFT - inode->i_blkbits);
......@@ -394,6 +395,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
}
clear_bit(META_dirty, &mp->flag);
set_bit(META_io, &mp->flag);
block_offset = offset >> inode->i_blkbits;
lblock = page_start + block_offset;
if (bio) {
......@@ -402,7 +404,6 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
len = min(xlen, blocks_per_mp);
xlen -= len;
bio_bytes += len << inode->i_blkbits;
set_bit(META_io, &mp->flag);
continue;
}
/* Not contiguous */
......@@ -424,12 +425,14 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
xlen = (PAGE_CACHE_SIZE - offset) >> inode->i_blkbits;
pblock = metapage_get_blocks(inode, lblock, &xlen);
if (!pblock) {
/* Need better error handling */
printk(KERN_ERR "JFS: metapage_get_blocks failed\n");
dec_io(page, last_write_complete);
/*
* We already called inc_io(), but can't cancel it
* with dec_io() until we're done with the page
*/
bad_blocks++;
continue;
}
set_bit(META_io, &mp->flag);
len = min(xlen, (int)JFS_SBI(inode->i_sb)->nbperpage);
bio = bio_alloc(GFP_NOFS, 1);
......@@ -459,6 +462,9 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
unlock_page(page);
if (bad_blocks)
goto err_out;
if (nr_underway == 0)
end_page_writeback(page);
......@@ -474,7 +480,9 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
bio_put(bio);
unlock_page(page);
dec_io(page, last_write_complete);
err_out:
while (bad_blocks--)
dec_io(page, last_write_complete);
return -EIO;
}
......
fs/jfs/jfs_types.h
浏览文件 @ ffd14285
......@@ -57,35 +57,6 @@ struct timestruc_t {
#define HIGHORDER 0x80000000u /* high order bit on */
#define ONES 0xffffffffu /* all bit on */
/*
* logical xd (lxd)
*/
typedef struct {
unsigned len:24;
unsigned off1:8;
u32 off2;
} lxd_t;
/* lxd_t field construction */
#define LXDlength(lxd, length32) ( (lxd)->len = length32 )
#define LXDoffset(lxd, offset64)\
{\
(lxd)->off1 = ((s64)offset64) >> 32;\
(lxd)->off2 = (offset64) & 0xffffffff;\
}
/* lxd_t field extraction */
#define lengthLXD(lxd) ( (lxd)->len )
#define offsetLXD(lxd)\
( ((s64)((lxd)->off1)) << 32 | (lxd)->off2 )
/* lxd list */
struct lxdlist {
s16 maxnlxd;
s16 nlxd;
lxd_t *lxd;
};
/*
* physical xd (pxd)
*/
......
fs/jfs/jfs_xtree.c
浏览文件 @ ffd14285
......@@ -164,11 +164,8 @@ int xtLookup(struct inode *ip, s64 lstart,
/* is lookup offset beyond eof ? */
size = ((u64) ip->i_size + (JFS_SBI(ip->i_sb)->bsize - 1)) >>
JFS_SBI(ip->i_sb)->l2bsize;
if (lstart >= size) {
jfs_err("xtLookup: lstart (0x%lx) >= size (0x%lx)",
(ulong) lstart, (ulong) size);
if (lstart >= size)
return 0;
}
}
/*
......@@ -220,264 +217,6 @@ int xtLookup(struct inode *ip, s64 lstart,
return rc;
}
/*
* xtLookupList()
*
* function: map a single logical extent into a list of physical extent;
*
* parameter:
* struct inode *ip,
* struct lxdlist *lxdlist, lxd list (in)
* struct xadlist *xadlist, xad list (in/out)
* int flag)
*
* coverage of lxd by xad under assumption of
* . lxd's are ordered and disjoint.
* . xad's are ordered and disjoint.
*
* return:
* 0: success
*
* note: a page being written (even a single byte) is backed fully,
* except the last page which is only backed with blocks
* required to cover the last byte;
* the extent backing a page is fully contained within an xad;
*/
int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
struct xadlist * xadlist, int flag)
{
int rc = 0;
struct btstack btstack;
int cmp;
s64 bn;
struct metapage *mp;
xtpage_t *p;
int index;
lxd_t *lxd;
xad_t *xad, *pxd;
s64 size, lstart, lend, xstart, xend, pstart;
s64 llen, xlen, plen;
s64 xaddr, paddr;
int nlxd, npxd, maxnpxd;
npxd = xadlist->nxad = 0;
maxnpxd = xadlist->maxnxad;
pxd = xadlist->xad;
nlxd = lxdlist->nlxd;
lxd = lxdlist->lxd;
lstart = offsetLXD(lxd);
llen = lengthLXD(lxd);
lend = lstart + llen;
size = (ip->i_size + (JFS_SBI(ip->i_sb)->bsize - 1)) >>
JFS_SBI(ip->i_sb)->l2bsize;
/*
* search for the xad entry covering the logical extent
*/
search:
if (lstart >= size)
return 0;
if ((rc = xtSearch(ip, lstart, NULL, &cmp, &btstack, 0)))
return rc;
/*
* compute the physical extent covering logical extent
*
* N.B. search may have failed (e.g., hole in sparse file),
* and returned the index of the next entry.
*/
//map:
/* retrieve search result */
XT_GETSEARCH(ip, btstack.top, bn, mp, p, index);
/* is xad on the next sibling page ? */
if (index == le16_to_cpu(p->header.nextindex)) {
if (p->header.flag & BT_ROOT)
goto mapend;
if ((bn = le64_to_cpu(p->header.next)) == 0)
goto mapend;
XT_PUTPAGE(mp);
/* get next sibling page */
XT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
if (rc)
return rc;
index = XTENTRYSTART;
}
xad = &p->xad[index];
/*
* is lxd covered by xad ?
*/
compare:
xstart = offsetXAD(xad);
xlen = lengthXAD(xad);
xend = xstart + xlen;
xaddr = addressXAD(xad);
compare1:
if (xstart < lstart)
goto compare2;
/* (lstart <= xstart) */
/* lxd is NOT covered by xad */
if (lend <= xstart) {
/*
* get next lxd
*/
if (--nlxd == 0)
goto mapend;
lxd++;
lstart = offsetLXD(lxd);
llen = lengthLXD(lxd);
lend = lstart + llen;
if (lstart >= size)
goto mapend;
/* compare with the current xad */
goto compare1;
}
/* lxd is covered by xad */
else { /* (xstart < lend) */
/* initialize new pxd */
pstart = xstart;
plen = min(lend - xstart, xlen);
paddr = xaddr;
goto cover;
}
/* (xstart < lstart) */
compare2:
/* lxd is covered by xad */
if (lstart < xend) {
/* initialize new pxd */
pstart = lstart;
plen = min(xend - lstart, llen);
paddr = xaddr + (lstart - xstart);
goto cover;
}
/* lxd is NOT covered by xad */
else { /* (xend <= lstart) */
/*
* get next xad
*
* linear search next xad covering lxd on
* the current xad page, and then tree search
*/
if (index == le16_to_cpu(p->header.nextindex) - 1) {
if (p->header.flag & BT_ROOT)
goto mapend;
XT_PUTPAGE(mp);
goto search;
} else {
index++;
xad++;
/* compare with new xad */
goto compare;
}
}
/*
* lxd is covered by xad and a new pxd has been initialized
* (lstart <= xstart < lend) or (xstart < lstart < xend)
*/
cover:
/* finalize pxd corresponding to current xad */
XT_PUTENTRY(pxd, xad->flag, pstart, plen, paddr);
if (++npxd >= maxnpxd)
goto mapend;
pxd++;
/*
* lxd is fully covered by xad
*/
if (lend <= xend) {
/*
* get next lxd
*/
if (--nlxd == 0)
goto mapend;
lxd++;
lstart = offsetLXD(lxd);
llen = lengthLXD(lxd);
lend = lstart + llen;
if (lstart >= size)
goto mapend;
/*
* test for old xad covering new lxd
* (old xstart < new lstart)
*/
goto compare2;
}
/*
* lxd is partially covered by xad
*/
else { /* (xend < lend) */
/*
* get next xad
*
* linear search next xad covering lxd on
* the current xad page, and then next xad page search
*/
if (index == le16_to_cpu(p->header.nextindex) - 1) {
if (p->header.flag & BT_ROOT)
goto mapend;
if ((bn = le64_to_cpu(p->header.next)) == 0)
goto mapend;
XT_PUTPAGE(mp);
/* get next sibling page */
XT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
if (rc)
return rc;
index = XTENTRYSTART;
xad = &p->xad[index];
} else {
index++;
xad++;
}
/*
* test for new xad covering old lxd
* (old lstart < new xstart)
*/
goto compare;
}
mapend:
xadlist->nxad = npxd;
//out:
XT_PUTPAGE(mp);
return rc;
}
/*
* xtSearch()
*
......
fs/jfs/jfs_xtree.h
浏览文件 @ ffd14285
......@@ -110,8 +110,6 @@ typedef union {
*/
extern int xtLookup(struct inode *ip, s64 lstart, s64 llen,
int *pflag, s64 * paddr, int *plen, int flag);
extern int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
struct xadlist * xadlist, int flag);
extern void xtInitRoot(tid_t tid, struct inode *ip);
extern int xtInsert(tid_t tid, struct inode *ip,
int xflag, s64 xoff, int xlen, s64 * xaddrp, int flag);
......
fs/jfs/super.c
浏览文件 @ ffd14285
......@@ -29,6 +29,7 @@
#include <linux/posix_acl.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
#include <linux/crc32.h>
#include <asm/uaccess.h>
#include <linux/seq_file.h>
......@@ -168,6 +169,9 @@ static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_files = maxinodes;
buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
atomic_read(&imap->im_numfree));
buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
sizeof(sbi->uuid)/2);
buf->f_namelen = JFS_NAME_MAX;
return 0;
......
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