Merge bk://linux.bkbits.net/linux-2.5

into hostme.bitkeeper.com:/repos/j/jfs/linux-2.5

9 files changed, 141 insertions, 22 deletions

diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 67e4ba8ce0956c..a87b06fa8ff899 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -65,11 +65,13 @@ static int jfs_open(struct inode *inode, struct file *file)
 	if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
 	    (inode->i_size == 0)) {
 		struct jfs_inode_info *ji = JFS_IP(inode);
+		spin_lock_irq(&ji->ag_lock);
 		if (ji->active_ag == -1) {
 			ji->active_ag = ji->agno;
 			atomic_inc(
 			    &JFS_SBI(inode->i_sb)->bmap->db_active[ji->agno]);
 		}
+		spin_unlock_irq(&ji->ag_lock);
 	}
 
 	return 0;
@@ -78,11 +80,13 @@ static int jfs_release(struct inode *inode, struct file *file)
 {
 	struct jfs_inode_info *ji = JFS_IP(inode);
 
+	spin_lock_irq(&ji->ag_lock);
 	if (ji->active_ag != -1) {
 		struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
 		atomic_dec(&bmap->db_active[ji->active_ag]);
 		ji->active_ag = -1;
 	}
+	spin_unlock_irq(&ji->ag_lock);
 
 	return 0;
 }
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index 1b55df36f5cc7a..ed734330504e10 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -1204,6 +1204,12 @@ static int dbAllocNext(struct bmap * bmp, struct dmap * dp, s64 blkno,
 	s8 *leaf;
 	u32 mask;
 
+	if (dp->tree.leafidx != cpu_to_le32(LEAFIND)) {
+		jfs_error(bmp->db_ipbmap->i_sb,
+			  "dbAllocNext: Corrupt dmap page");
+		return -EIO;
+	}
+
 	/* pick up a pointer to the leaves of the dmap tree.
 	 */
 	leaf = dp->tree.stree + le32_to_cpu(dp->tree.leafidx);
@@ -1327,7 +1333,15 @@ dbAllocNear(struct bmap * bmp,
 	    struct dmap * dp, s64 blkno, int nblocks, int l2nb, s64 * results)
 {
 	int word, lword, rc;
-	s8 *leaf = dp->tree.stree + le32_to_cpu(dp->tree.leafidx);
+	s8 *leaf;
+
+	if (dp->tree.leafidx != cpu_to_le32(LEAFIND)) {
+		jfs_error(bmp->db_ipbmap->i_sb,
+			  "dbAllocNear: Corrupt dmap page");
+		return -EIO;
+	}
+
+	leaf = dp->tree.stree + le32_to_cpu(dp->tree.leafidx);
 
 	/* determine the word within the dmap that holds the hint
 	 * (i.e. blkno).  also, determine the last word in the dmap
@@ -1489,6 +1503,13 @@ dbAllocAG(struct bmap * bmp, int agno, s64 nblocks, int l2nb, s64 * results)
 	dcp = (struct dmapctl *) mp->data;
 	budmin = dcp->budmin;
 
+	if (dcp->leafidx != cpu_to_le32(CTLLEAFIND)) {
+		jfs_error(bmp->db_ipbmap->i_sb,
+			  "dbAllocAG: Corrupt dmapctl page");
+		release_metapage(mp);
+		return -EIO;
+	}
+
 	/* search the subtree(s) of the dmap control page that describes
 	 * the allocation group, looking for sufficient free space.  to begin,
 	 * determine how many allocation groups are represented in a dmap
@@ -1697,6 +1718,13 @@ static int dbFindCtl(struct bmap * bmp, int l2nb, int level, s64 * blkno)
 		dcp = (struct dmapctl *) mp->data;
 		budmin = dcp->budmin;
 
+		if (dcp->leafidx != cpu_to_le32(CTLLEAFIND)) {
+			jfs_error(bmp->db_ipbmap->i_sb,
+				  "dbFindCtl: Corrupt dmapctl page");
+			release_metapage(mp);
+			return -EIO;
+		}
+
 		/* search the tree within the dmap control page for
 		 * sufficent free space.  if sufficient free space is found,
 		 * dbFindLeaf() returns the index of the leaf at which
@@ -2459,6 +2487,13 @@ dbAdjCtl(struct bmap * bmp, s64 blkno, int newval, int alloc, int level)
 		return -EIO;
 	dcp = (struct dmapctl *) mp->data;
 
+	if (dcp->leafidx != cpu_to_le32(CTLLEAFIND)) {
+		jfs_error(bmp->db_ipbmap->i_sb,
+			  "dbAdjCtl: Corrupt dmapctl page");
+		release_metapage(mp);
+		return -EIO;
+	}
+
 	/* determine the leaf number corresponding to the block and
 	 * the index within the dmap control tree.
 	 */
diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c
index 2068c4746e029d..2b411bc32eb833 100644
--- a/fs/jfs/jfs_extent.c
+++ b/fs/jfs/jfs_extent.c
@@ -553,6 +553,7 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
 
 	if (S_ISREG(ip->i_mode) && (ji->fileset == FILESYSTEM_I)) {
 		ag = BLKTOAG(daddr, sbi);
+		spin_lock_irq(&ji->ag_lock);
 		if (ji->active_ag == -1) {
 			atomic_inc(&bmp->db_active[ag]);
 			ji->active_ag = ag;
@@ -561,6 +562,7 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
 			atomic_inc(&bmp->db_active[ag]);
 			ji->active_ag = ag;
 		}
+		spin_unlock_irq(&ji->ag_lock);
 	}
 
 	return (0);
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 86246f4db7a6fd..cfb582d2821743 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -1280,6 +1280,7 @@ int diFree(struct inode *ip)
 	 * to be freed by the transaction;  
 	 */
 	tid = txBegin(ipimap->i_sb, COMMIT_FORCE);
+	down(&JFS_IP(ipimap)->commit_sem);
 
 	/* acquire tlock of the iag page of the freed ixad 
 	 * to force the page NOHOMEOK (even though no data is
@@ -1312,6 +1313,7 @@ int diFree(struct inode *ip)
 	rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE);
 
 	txEnd(tid);
+	up(&JFS_IP(ipimap)->commit_sem);
 
 	/* unlock the AG inode map information */
 	AG_UNLOCK(imap, agno);
@@ -2622,10 +2624,13 @@ diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp)
 		 */
 #endif				/*  _STILL_TO_PORT */
 		tid = txBegin(sb, COMMIT_FORCE);
+		down(&JFS_IP(ipimap)->commit_sem);
 
 		/* update the inode map addressing structure to point to it */
 		if ((rc =
 		     xtInsert(tid, ipimap, 0, blkno, xlen, &xaddr, 0))) {
+			txEnd(tid);
+			up(&JFS_IP(ipimap)->commit_sem);
 			/* Free the blocks allocated for the iag since it was
 			 * not successfully added to the inode map
 			 */
@@ -2650,6 +2655,7 @@ diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp)
 		rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE);
 
 		txEnd(tid);
+		up(&JFS_IP(ipimap)->commit_sem);
 
 		duplicateIXtree(sb, blkno, xlen, &xaddr);
 
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index ac608c9ff5307a..5496bfb149cf20 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -53,6 +53,7 @@ struct jfs_inode_info {
 	lid_t	blid;		/* lid of pseudo buffer?	*/
 	lid_t	atlhead;	/* anonymous tlock list head	*/
 	lid_t	atltail;	/* anonymous tlock list tail	*/
+	spinlock_t ag_lock;	/* protects active_ag		*/
 	struct list_head anon_inode_list; /* inodes having anonymous txns */
 	/*
 	 * rdwrlock serializes xtree between reads & writes and synchronizes
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index dd6578b7d3b260..831ee09c2b9b79 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -225,8 +225,16 @@ struct metapage *__get_metapage(struct inode *inode, unsigned long lblock,
 
 	if (absolute)
 		mapping = inode->i_sb->s_bdev->bd_inode->i_mapping;
-	else
+	else {
+		/*
+		 * If an nfs client tries to read an inode that is larger
+		 * than any existing inodes, we may try to read past the
+		 * end of the inode map
+		 */
+		if ((lblock << inode->i_blkbits) >= inode->i_size)
+			return NULL;
 		mapping = inode->i_mapping;
+	}
 
 	hash_ptr = meta_hash(mapping, lblock);
 again:
diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c
index 5aa647326887e3..19913fcd4c332a 100644
--- a/fs/jfs/jfs_xtree.c
+++ b/fs/jfs/jfs_xtree.c
@@ -1071,8 +1071,10 @@ xtSplitUp(tid_t tid,
 		 */
 		/* get/pin the parent page <sp> */
 		XT_GETPAGE(ip, parent->bn, smp, PSIZE, sp, rc);
-		if (rc)
-			goto errout2;
+		if (rc) {
+			XT_PUTPAGE(rcmp);
+			return rc;
+		}
 
 		/*
 		 * The new key entry goes ONE AFTER the index of parent entry,
@@ -1106,8 +1108,10 @@ xtSplitUp(tid_t tid,
 			rc = (sp->header.flag & BT_ROOT) ?
 			    xtSplitRoot(tid, ip, split, &rmp) :
 			    xtSplitPage(tid, ip, split, &rmp, &rbn);
-			if (rc)
-				goto errout1;
+			if (rc) {
+				XT_PUTPAGE(smp);
+				return rc;
+			}
 
 			XT_PUTPAGE(smp);
 			/* keep new child page <rp> pinned */
@@ -1170,19 +1174,6 @@ xtSplitUp(tid_t tid,
 	XT_PUTPAGE(rmp);
 
 	return 0;
-
-	/*
-	 * If something fails in the above loop we were already walking back
-	 * up the tree and the tree is now inconsistent.
-	 * release all pages we're holding.
-	 */
-      errout1:
-	XT_PUTPAGE(smp);
-
-      errout2:
-	XT_PUTPAGE(rcmp);
-
-	return rc;
 }
 
 
@@ -3504,7 +3495,17 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag)
 	 * a page that was formerly to the right, let's make sure that the
 	 * next pointer is zero.
 	 */
-	p->header.next = 0;
+	if (p->header.next) {
+		if (log)
+			/*
+			 * Make sure this change to the header is logged.
+			 * If we really truncate this leaf, the flag
+			 * will be changed to tlckTRUNCATE
+			 */
+			tlck = txLock(tid, ip, mp, tlckXTREE|tlckGROW);
+		BT_MARK_DIRTY(mp, ip);
+		p->header.next = 0;
+	}
 
 	freed = 0;
 
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 871371d5a1aa32..8c3a8e78d0f8ce 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) International Business Machines Corp., 2000-2003
+ *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
  *
  *   This program is free software;  you can redistribute it and/or modify
@@ -18,6 +18,7 @@
  */
 
 #include <linux/fs.h>
+#include <linux/ctype.h>
 #include "jfs_incore.h"
 #include "jfs_superblock.h"
 #include "jfs_inode.h"
@@ -43,6 +44,7 @@ extern int jfs_init_acl(struct inode *, struct inode *);
  */
 struct inode_operations jfs_dir_inode_operations;
 struct file_operations jfs_dir_operations;
+struct dentry_operations jfs_ci_dentry_operations;
 
 static s64 commitZeroLink(tid_t, struct inode *);
 
@@ -1422,7 +1424,15 @@ static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struc
 		return ERR_PTR(-EACCES);
 	}
 
-	return d_splice_alias(ip, dentry);
+	if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)
+		dentry->d_op = &jfs_ci_dentry_operations;
+
+	dentry = d_splice_alias(ip, dentry);
+
+	if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2))
+		dentry->d_op = &jfs_ci_dentry_operations;
+
+	return dentry;
 }
 
 struct dentry *jfs_get_parent(struct dentry *dentry)
@@ -1476,3 +1486,46 @@ struct file_operations jfs_dir_operations = {
 	.readdir	= jfs_readdir,
 	.fsync		= jfs_fsync,
 };
+
+static int jfs_ci_hash(struct dentry *dir, struct qstr *this)
+{
+	unsigned long hash;
+	int i;
+
+	hash = init_name_hash();
+	for (i=0; i < this->len; i++)
+		hash = partial_name_hash(tolower(this->name[i]), hash);
+	this->hash = end_name_hash(hash);
+
+	return 0;
+}
+
+static int jfs_ci_compare(struct dentry *dir, struct qstr *a, struct qstr *b)
+{
+	int i, result = 1;
+
+	if (a->len != b->len)
+		goto out;
+	for (i=0; i < a->len; i++) {
+		if (tolower(a->name[i]) != tolower(b->name[i]))
+			goto out;
+	}
+	result = 0;
+
+	/*
+	 * We want creates to preserve case.  A negative dentry, a, that
+	 * has a different case than b may cause a new entry to be created
+	 * with the wrong case.  Since we can't tell if a comes from a negative
+	 * dentry, we blindly replace it with b.  This should be harmless if
+	 * a is not a negative dentry.
+	 */
+	memcpy((unsigned char *)a->name, b->name, a->len);
+out:
+	return result;
+}
+
+struct dentry_operations jfs_ci_dentry_operations =
+{
+	.d_hash = jfs_ci_hash,
+	.d_compare = jfs_ci_compare,
+};
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 18fdb77086a0ee..9615a83d7ef016 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -82,6 +82,8 @@ extern void jfs_write_inode(struct inode *inode, int wait);
 extern struct dentry *jfs_get_parent(struct dentry *dentry);
 extern int jfs_extendfs(struct super_block *, s64, int);
 
+extern struct dentry_operations jfs_ci_dentry_operations;
+
 #ifdef PROC_FS_JFS		/* see jfs_debug.h */
 extern void jfs_proc_init(void);
 extern void jfs_proc_clean(void);
@@ -141,10 +143,13 @@ static void jfs_destroy_inode(struct inode *inode)
 {
 	struct jfs_inode_info *ji = JFS_IP(inode);
 
+	spin_lock_irq(&ji->ag_lock);
 	if (ji->active_ag != -1) {
 		struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
 		atomic_dec(&bmap->db_active[ji->active_ag]);
+		ji->active_ag = -1;
 	}
+	spin_unlock_irq(&ji->ag_lock);
 
 #ifdef CONFIG_JFS_POSIX_ACL
 	if (ji->i_acl != JFS_ACL_NOT_CACHED) {
@@ -443,6 +448,9 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
 	if (!sb->s_root)
 		goto out_no_root;
 
+	if (sbi->mntflag & JFS_OS2)
+		sb->s_root->d_op = &jfs_ci_dentry_operations;
+
 	/* logical blocks are represented by 40 bits in pxd_t, etc. */
 	sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
 #if BITS_PER_LONG == 32
@@ -559,6 +567,7 @@ static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
 		init_rwsem(&jfs_ip->rdwrlock);
 		init_MUTEX(&jfs_ip->commit_sem);
 		init_rwsem(&jfs_ip->xattr_sem);
+		spin_lock_init(&jfs_ip->ag_lock);
 		jfs_ip->active_ag = -1;
 #ifdef CONFIG_JFS_POSIX_ACL
 		jfs_ip->i_acl = JFS_ACL_NOT_CACHED;