mirror of
https://github.com/adulau/aha.git
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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
This commit is contained in:
Linus Torvalds
commit
ffd1428514
8 changed files with 46 additions and 344 deletions
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|
@ -1,6 +1,7 @@
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config JFS_FS
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tristate "JFS filesystem support"
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select NLS
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select CRC32
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help
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This is a port of IBM's Journaled Filesystem . More information is
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available in the file <file:Documentation/filesystems/jfs.txt>.
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|
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@ -362,11 +362,12 @@ exit:
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int extHint(struct inode *ip, s64 offset, xad_t * xp)
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{
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struct super_block *sb = ip->i_sb;
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struct xadlist xadl;
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struct lxdlist lxdl;
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lxd_t lxd;
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int nbperpage = JFS_SBI(sb)->nbperpage;
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s64 prev;
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int rc, nbperpage = JFS_SBI(sb)->nbperpage;
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int rc = 0;
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s64 xaddr;
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int xlen;
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int xflag;
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/* init the hint as "no hint provided" */
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XADaddress(xp, 0);
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@ -376,46 +377,30 @@ int extHint(struct inode *ip, s64 offset, xad_t * xp)
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*/
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prev = ((offset & ~POFFSET) >> JFS_SBI(sb)->l2bsize) - nbperpage;
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/* if the offsets in the first page of the file,
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* no hint provided.
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/* if the offset is in the first page of the file, no hint provided.
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*/
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if (prev < 0)
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return (0);
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goto out;
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/* prepare to lookup the previous page's extent info */
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lxdl.maxnlxd = 1;
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lxdl.nlxd = 1;
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lxdl.lxd = &lxd;
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LXDoffset(&lxd, prev)
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LXDlength(&lxd, nbperpage);
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rc = xtLookup(ip, prev, nbperpage, &xflag, &xaddr, &xlen, 0);
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xadl.maxnxad = 1;
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xadl.nxad = 0;
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xadl.xad = xp;
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/* perform the lookup */
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if ((rc = xtLookupList(ip, &lxdl, &xadl, 0)))
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return (rc);
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/* check if no extent exists for the previous page.
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* this is possible for sparse files.
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*/
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if (xadl.nxad == 0) {
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// assert(ISSPARSE(ip));
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return (0);
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if ((rc == 0) && xlen) {
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if (xlen != nbperpage) {
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jfs_error(ip->i_sb, "extHint: corrupt xtree");
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rc = -EIO;
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}
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/* only preserve the abnr flag within the xad flags
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XADaddress(xp, xaddr);
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XADlength(xp, xlen);
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/*
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* only preserve the abnr flag within the xad flags
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* of the returned hint.
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*/
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xp->flag &= XAD_NOTRECORDED;
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xp->flag = xflag & XAD_NOTRECORDED;
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} else
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rc = 0;
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if(xadl.nxad != 1 || lengthXAD(xp) != nbperpage) {
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jfs_error(ip->i_sb, "extHint: corrupt xtree");
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return -EIO;
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}
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return (0);
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out:
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return (rc);
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}
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@ -56,12 +56,6 @@
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#include "jfs_superblock.h"
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#include "jfs_debug.h"
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/*
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* __mark_inode_dirty expects inodes to be hashed. Since we don't want
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* special inodes in the fileset inode space, we make them appear hashed,
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* but do not put on any lists.
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*/
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/*
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* imap locks
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*/
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@ -497,7 +491,9 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)
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release_metapage(mp);
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/*
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* that will look hashed, but won't be on any list; hlist_del()
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* __mark_inode_dirty expects inodes to be hashed. Since we don't
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* want special inodes in the fileset inode space, we make them
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* appear hashed, but do not put on any lists. hlist_del()
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* will work fine and require no locking.
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*/
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ip->i_hash.pprev = &ip->i_hash.next;
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@ -369,6 +369,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
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unsigned long bio_bytes = 0;
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unsigned long bio_offset = 0;
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int offset;
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int bad_blocks = 0;
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page_start = (sector_t)page->index <<
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(PAGE_CACHE_SHIFT - inode->i_blkbits);
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@ -394,6 +395,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
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}
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clear_bit(META_dirty, &mp->flag);
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set_bit(META_io, &mp->flag);
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block_offset = offset >> inode->i_blkbits;
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lblock = page_start + block_offset;
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if (bio) {
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@ -402,7 +404,6 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
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len = min(xlen, blocks_per_mp);
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xlen -= len;
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bio_bytes += len << inode->i_blkbits;
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set_bit(META_io, &mp->flag);
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continue;
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}
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/* Not contiguous */
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@ -424,12 +425,14 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
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xlen = (PAGE_CACHE_SIZE - offset) >> inode->i_blkbits;
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pblock = metapage_get_blocks(inode, lblock, &xlen);
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if (!pblock) {
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/* Need better error handling */
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printk(KERN_ERR "JFS: metapage_get_blocks failed\n");
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dec_io(page, last_write_complete);
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/*
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* We already called inc_io(), but can't cancel it
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* with dec_io() until we're done with the page
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*/
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bad_blocks++;
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continue;
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}
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set_bit(META_io, &mp->flag);
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len = min(xlen, (int)JFS_SBI(inode->i_sb)->nbperpage);
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bio = bio_alloc(GFP_NOFS, 1);
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@ -459,6 +462,9 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
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unlock_page(page);
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if (bad_blocks)
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goto err_out;
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if (nr_underway == 0)
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end_page_writeback(page);
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@ -474,7 +480,9 @@ skip:
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bio_put(bio);
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unlock_page(page);
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dec_io(page, last_write_complete);
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err_out:
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while (bad_blocks--)
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dec_io(page, last_write_complete);
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return -EIO;
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}
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@ -57,35 +57,6 @@ struct timestruc_t {
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#define HIGHORDER 0x80000000u /* high order bit on */
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#define ONES 0xffffffffu /* all bit on */
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/*
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* logical xd (lxd)
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*/
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typedef struct {
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unsigned len:24;
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unsigned off1:8;
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u32 off2;
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} lxd_t;
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/* lxd_t field construction */
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#define LXDlength(lxd, length32) ( (lxd)->len = length32 )
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#define LXDoffset(lxd, offset64)\
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{\
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(lxd)->off1 = ((s64)offset64) >> 32;\
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(lxd)->off2 = (offset64) & 0xffffffff;\
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}
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/* lxd_t field extraction */
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#define lengthLXD(lxd) ( (lxd)->len )
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#define offsetLXD(lxd)\
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( ((s64)((lxd)->off1)) << 32 | (lxd)->off2 )
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/* lxd list */
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struct lxdlist {
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s16 maxnlxd;
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s16 nlxd;
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lxd_t *lxd;
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};
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/*
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* physical xd (pxd)
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*/
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|
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@ -164,12 +164,9 @@ int xtLookup(struct inode *ip, s64 lstart,
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/* is lookup offset beyond eof ? */
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size = ((u64) ip->i_size + (JFS_SBI(ip->i_sb)->bsize - 1)) >>
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JFS_SBI(ip->i_sb)->l2bsize;
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if (lstart >= size) {
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jfs_err("xtLookup: lstart (0x%lx) >= size (0x%lx)",
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(ulong) lstart, (ulong) size);
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if (lstart >= size)
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return 0;
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}
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}
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/*
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* search for the xad entry covering the logical extent
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@ -220,264 +217,6 @@ int xtLookup(struct inode *ip, s64 lstart,
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return rc;
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}
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/*
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* xtLookupList()
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*
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* function: map a single logical extent into a list of physical extent;
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*
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* parameter:
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* struct inode *ip,
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* struct lxdlist *lxdlist, lxd list (in)
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* struct xadlist *xadlist, xad list (in/out)
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* int flag)
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*
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* coverage of lxd by xad under assumption of
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* . lxd's are ordered and disjoint.
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* . xad's are ordered and disjoint.
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*
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* return:
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* 0: success
|
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*
|
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* note: a page being written (even a single byte) is backed fully,
|
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* except the last page which is only backed with blocks
|
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* required to cover the last byte;
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* the extent backing a page is fully contained within an xad;
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*/
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int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
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struct xadlist * xadlist, int flag)
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{
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int rc = 0;
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struct btstack btstack;
|
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int cmp;
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s64 bn;
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struct metapage *mp;
|
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xtpage_t *p;
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int index;
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lxd_t *lxd;
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xad_t *xad, *pxd;
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s64 size, lstart, lend, xstart, xend, pstart;
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s64 llen, xlen, plen;
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s64 xaddr, paddr;
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int nlxd, npxd, maxnpxd;
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|
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npxd = xadlist->nxad = 0;
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maxnpxd = xadlist->maxnxad;
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pxd = xadlist->xad;
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|
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nlxd = lxdlist->nlxd;
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lxd = lxdlist->lxd;
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lstart = offsetLXD(lxd);
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llen = lengthLXD(lxd);
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lend = lstart + llen;
|
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|
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size = (ip->i_size + (JFS_SBI(ip->i_sb)->bsize - 1)) >>
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JFS_SBI(ip->i_sb)->l2bsize;
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||||
|
||||
/*
|
||||
* search for the xad entry covering the logical extent
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||||
*/
|
||||
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()
|
||||
*
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
|
|
|
|||
Loading…
Reference in a new issue