X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=fs%2Fxfs%2Fxfs_dir2.c;h=80e0dc51361c07e541726ff75871f399fd58d181;hb=517ac45af4b55913587279d89001171c222f22e7;hp=7cb26529766b7759c2ed743273d0942d71765a15;hpb=ce1d5b23a8d1e19866ab82bdec0dc41fde5273d8;p=linux-2.6-omap-h63xx.git

diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index 7cb26529766..80e0dc51361 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -46,6 +46,54 @@
 
 struct xfs_name xfs_name_dotdot = {"..", 2};
 
+extern const struct xfs_nameops xfs_default_nameops;
+
+/*
+ * ASCII case-insensitive (ie. A-Z) support for directories that was
+ * used in IRIX.
+ */
+STATIC xfs_dahash_t
+xfs_ascii_ci_hashname(
+	struct xfs_name	*name)
+{
+	xfs_dahash_t	hash;
+	int		i;
+
+	for (i = 0, hash = 0; i < name->len; i++)
+		hash = tolower(name->name[i]) ^ rol32(hash, 7);
+
+	return hash;
+}
+
+STATIC enum xfs_dacmp
+xfs_ascii_ci_compname(
+	struct xfs_da_args *args,
+	const char	*name,
+	int 		len)
+{
+	enum xfs_dacmp	result;
+	int		i;
+
+	if (args->namelen != len)
+		return XFS_CMP_DIFFERENT;
+
+	result = XFS_CMP_EXACT;
+	for (i = 0; i < len; i++) {
+		if (args->name[i] == name[i])
+			continue;
+		if (tolower(args->name[i]) != tolower(name[i]))
+			return XFS_CMP_DIFFERENT;
+		result = XFS_CMP_CASE;
+	}
+
+	return result;
+}
+
+static struct xfs_nameops xfs_ascii_ci_nameops = {
+	.hashname	= xfs_ascii_ci_hashname,
+	.compname	= xfs_ascii_ci_compname,
+};
+
 void
 xfs_dir_mount(
 	xfs_mount_t	*mp)
@@ -65,6 +113,10 @@ xfs_dir_mount(
 		(mp->m_dirblksize - (uint)sizeof(xfs_da_node_hdr_t)) /
 		(uint)sizeof(xfs_da_node_entry_t);
 	mp->m_dir_magicpct = (mp->m_dirblksize * 37) / 100;
+	if (xfs_sb_version_hasasciici(&mp->m_sb))
+		mp->m_dirnameops = &xfs_ascii_ci_nameops;
+	else
+		mp->m_dirnameops = &xfs_default_nameops;
 }
 
 /*
@@ -162,9 +214,10 @@ xfs_dir_createname(
 		return rval;
 	XFS_STATS_INC(xs_dir_create);
 
+	memset(&args, 0, sizeof(xfs_da_args_t));
 	args.name = name->name;
 	args.namelen = name->len;
-	args.hashval = xfs_da_hashname(name->name, name->len);
+	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
 	args.inumber = inum;
 	args.dp = dp;
 	args.firstblock = first;
@@ -172,8 +225,7 @@ xfs_dir_createname(
 	args.total = total;
 	args.whichfork = XFS_DATA_FORK;
 	args.trans = tp;
-	args.justcheck = 0;
-	args.addname = args.oknoent = 1;
+	args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
 
 	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
 		rval = xfs_dir2_sf_addname(&args);
@@ -190,15 +242,44 @@ xfs_dir_createname(
 	return rval;
 }
 
+/*
+ * If doing a CI lookup and case-insensitive match, dup actual name into
+ * args.value. Return EEXIST for success (ie. name found) or an error.
+ */
+int
+xfs_dir_cilookup_result(
+	struct xfs_da_args *args,
+	const char	*name,
+	int		len)
+{
+	if (args->cmpresult == XFS_CMP_DIFFERENT)
+		return ENOENT;
+	if (args->cmpresult != XFS_CMP_CASE ||
+					!(args->op_flags & XFS_DA_OP_CILOOKUP))
+		return EEXIST;
+
+	args->value = kmem_alloc(len, KM_MAYFAIL);
+	if (!args->value)
+		return ENOMEM;
+
+	memcpy(args->value, name, len);
+	args->valuelen = len;
+	return EEXIST;
+}
+
 /*
  * Lookup a name in a directory, give back the inode number.
+ * If ci_name is not NULL, returns the actual name in ci_name if it differs
+ * to name, or ci_name->name is set to NULL for an exact match.
  */
+
 int
 xfs_dir_lookup(
 	xfs_trans_t	*tp,
 	xfs_inode_t	*dp,
 	struct xfs_name	*name,
-	xfs_ino_t	*inum)		/* out: inode number */
+	xfs_ino_t	*inum,		/* out: inode number */
+	struct xfs_name *ci_name)	/* out: actual name if CI match */
 {
 	xfs_da_args_t	args;
 	int		rval;
@@ -206,15 +287,17 @@ xfs_dir_lookup(
 
 	ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
 	XFS_STATS_INC(xs_dir_lookup);
-	memset(&args, 0, sizeof(xfs_da_args_t));
 
+	memset(&args, 0, sizeof(xfs_da_args_t));
 	args.name = name->name;
 	args.namelen = name->len;
-	args.hashval = xfs_da_hashname(name->name, name->len);
+	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
 	args.dp = dp;
 	args.whichfork = XFS_DATA_FORK;
 	args.trans = tp;
-	args.oknoent = 1;
+	args.op_flags = XFS_DA_OP_OKNOENT;
+	if (ci_name)
+		args.op_flags |= XFS_DA_OP_CILOOKUP;
 
 	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
 		rval = xfs_dir2_sf_lookup(&args);
@@ -230,8 +313,13 @@ xfs_dir_lookup(
 		rval = xfs_dir2_node_lookup(&args);
 	if (rval == EEXIST)
 		rval = 0;
-	if (rval == 0)
+	if (!rval) {
 		*inum = args.inumber;
+		if (ci_name) {
+			ci_name->name = args.value;
+			ci_name->len = args.valuelen;
+		}
+	}
 	return rval;
 }
 
@@ -255,9 +343,10 @@ xfs_dir_removename(
 	ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
 	XFS_STATS_INC(xs_dir_remove);
 
+	memset(&args, 0, sizeof(xfs_da_args_t));
 	args.name = name->name;
 	args.namelen = name->len;
-	args.hashval = xfs_da_hashname(name->name, name->len);
+	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
 	args.inumber = ino;
 	args.dp = dp;
 	args.firstblock = first;
@@ -265,7 +354,6 @@ xfs_dir_removename(
 	args.total = total;
 	args.whichfork = XFS_DATA_FORK;
 	args.trans = tp;
-	args.justcheck = args.addname = args.oknoent = 0;
 
 	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
 		rval = xfs_dir2_sf_removename(&args);
@@ -338,9 +426,10 @@ xfs_dir_replace(
 	if ((rval = xfs_dir_ino_validate(tp->t_mountp, inum)))
 		return rval;
 
+	memset(&args, 0, sizeof(xfs_da_args_t));
 	args.name = name->name;
 	args.namelen = name->len;
-	args.hashval = xfs_da_hashname(name->name, name->len);
+	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
 	args.inumber = inum;
 	args.dp = dp;
 	args.firstblock = first;
@@ -348,7 +437,6 @@ xfs_dir_replace(
 	args.total = total;
 	args.whichfork = XFS_DATA_FORK;
 	args.trans = tp;
-	args.justcheck = args.addname = args.oknoent = 0;
 
 	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
 		rval = xfs_dir2_sf_replace(&args);
@@ -384,15 +472,16 @@ xfs_dir_canenter(
 		return 0;
 
 	ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
-	memset(&args, 0, sizeof(xfs_da_args_t));
 
+	memset(&args, 0, sizeof(xfs_da_args_t));
 	args.name = name->name;
 	args.namelen = name->len;
-	args.hashval = xfs_da_hashname(name->name, name->len);
+	args.hashval = dp->i_mount->m_dirnameops->hashname(name);
 	args.dp = dp;
 	args.whichfork = XFS_DATA_FORK;
 	args.trans = tp;
-	args.justcheck = args.addname = args.oknoent = 1;
+	args.op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME |
+							XFS_DA_OP_OKNOENT;
 
 	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
 		rval = xfs_dir2_sf_addname(&args);
@@ -493,7 +582,7 @@ xfs_dir2_grow_inode(
 					args->firstblock, args->total,
 					&mapp[mapi], &nmap, args->flist,
 					NULL))) {
-				kmem_free(mapp, sizeof(*mapp) * count);
+				kmem_free(mapp);
 				return error;
 			}
 			if (nmap < 1)
@@ -525,14 +614,14 @@ xfs_dir2_grow_inode(
 	    mapp[mapi - 1].br_startoff + mapp[mapi - 1].br_blockcount !=
 	    bno + count) {
 		if (mapp != &map)
-			kmem_free(mapp, sizeof(*mapp) * count);
+			kmem_free(mapp);
 		return XFS_ERROR(ENOSPC);
 	}
 	/*
 	 * Done with the temporary mapping table.
 	 */
 	if (mapp != &map)
-		kmem_free(mapp, sizeof(*mapp) * count);
+		kmem_free(mapp);
 	*dbp = xfs_dir2_da_to_db(mp, (xfs_dablk_t)bno);
 	/*
 	 * Update file's size if this is the data space and it grew.