mm/memunmap: don't access uninitialized memmap in memunmap_pages()

[linux-2.6-block.git] / fs / udf / inode.c

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 9bb18311a22fc1a60bb642c8b68891c2e5a05949..ea80036d7897b60b0d07dcf996bffd54f85ee530 100644 (file)
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -45,6 +45,13 @@
 
 #define EXTENT_MERGE_SIZE 5
 
+#define FE_MAPPED_PERMS        (FE_PERM_U_READ | FE_PERM_U_WRITE | FE_PERM_U_EXEC | \
+                        FE_PERM_G_READ | FE_PERM_G_WRITE | FE_PERM_G_EXEC | \
+                        FE_PERM_O_READ | FE_PERM_O_WRITE | FE_PERM_O_EXEC)
+
+#define FE_DELETE_PERMS        (FE_PERM_U_DELETE | FE_PERM_G_DELETE | \
+                        FE_PERM_O_DELETE)
+
 static umode_t udf_convert_permissions(struct fileEntry *);
 static int udf_update_inode(struct inode *, int);
 static int udf_sync_inode(struct inode *inode);
@@ -1458,6 +1465,8 @@ reread:
        else
                inode->i_mode = udf_convert_permissions(fe);
        inode->i_mode &= ~sbi->s_umask;
+       iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS;
+
        read_unlock(&sbi->s_cred_lock);
 
        link_count = le16_to_cpu(fe->fileLinkCount);
@@ -1485,6 +1494,8 @@ reread:
                iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
                iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
                iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
+               iinfo->i_streamdir = 0;
+               iinfo->i_lenStreams = 0;
        } else {
                inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
                    (inode->i_sb->s_blocksize_bits - 9);
@@ -1498,6 +1509,16 @@ reread:
                iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
                iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
                iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
+
+               /* Named streams */
+               iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0);
+               iinfo->i_locStreamdir =
+                       lelb_to_cpu(efe->streamDirectoryICB.extLocation);
+               iinfo->i_lenStreams = le64_to_cpu(efe->objectSize);
+               if (iinfo->i_lenStreams >= inode->i_size)
+                       iinfo->i_lenStreams -= inode->i_size;
+               else
+                       iinfo->i_lenStreams = 0;
        }
        inode->i_generation = iinfo->i_unique;
 
@@ -1619,6 +1640,23 @@ static umode_t udf_convert_permissions(struct fileEntry *fe)
        return mode;
 }
 
+void udf_update_extra_perms(struct inode *inode, umode_t mode)
+{
+       struct udf_inode_info *iinfo = UDF_I(inode);
+
+       /*
+        * UDF 2.01 sec. 3.3.3.3 Note 2:
+        * In Unix, delete permission tracks write
+        */
+       iinfo->i_extraPerms &= ~FE_DELETE_PERMS;
+       if (mode & 0200)
+               iinfo->i_extraPerms |= FE_PERM_U_DELETE;
+       if (mode & 0020)
+               iinfo->i_extraPerms |= FE_PERM_G_DELETE;
+       if (mode & 0002)
+               iinfo->i_extraPerms |= FE_PERM_O_DELETE;
+}
+
 int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
 {
        return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
@@ -1691,10 +1729,7 @@ static int udf_update_inode(struct inode *inode, int do_sync)
                   ((inode->i_mode & 0070) << 2) |
                   ((inode->i_mode & 0700) << 4);
 
-       udfperms |= (le32_to_cpu(fe->permissions) &
-                   (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
-                    FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
-                    FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
+       udfperms |= iinfo->i_extraPerms;
        fe->permissions = cpu_to_le32(udfperms);
 
        if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
@@ -1760,9 +1795,19 @@ static int udf_update_inode(struct inode *inode, int do_sync)
                       iinfo->i_ext.i_data,
                       inode->i_sb->s_blocksize -
                                        sizeof(struct extendedFileEntry));
-               efe->objectSize = cpu_to_le64(inode->i_size);
+               efe->objectSize =
+                       cpu_to_le64(inode->i_size + iinfo->i_lenStreams);
                efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
 
+               if (iinfo->i_streamdir) {
+                       struct long_ad *icb_lad = &efe->streamDirectoryICB;
+
+                       icb_lad->extLocation =
+                               cpu_to_lelb(iinfo->i_locStreamdir);
+                       icb_lad->extLength =
+                               cpu_to_le32(inode->i_sb->s_blocksize);
+               }
+
                udf_adjust_time(iinfo, inode->i_atime);
                udf_adjust_time(iinfo, inode->i_mtime);
                udf_adjust_time(iinfo, inode->i_ctime);