fs/ntfs3: Refactor ni_try_remove_attr_list function

Now we save a copy of primary record for restoration.
Also now we remove all attributes from subrecords.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index 1884299..3576268 100644 (file)
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -7,6 +7,7 @@
 
 #include <linux/fiemap.h>
 #include <linux/fs.h>
+#include <linux/minmax.h>
 #include <linux/vmalloc.h>
 
 #include "debug.h"
@@ -649,6 +650,7 @@ static int ni_try_remove_attr_list(struct ntfs_inode *ni)
        struct mft_inode *mi;
        u32 asize, free;
        struct MFT_REF ref;
+       struct MFT_REC *mrec;
        __le16 id;
 
        if (!ni->attr_list.dirty)
@@ -692,11 +694,17 @@ static int ni_try_remove_attr_list(struct ntfs_inode *ni)
                free -= asize;
        }
 
+       /* Make a copy of primary record to restore if error. */
+       mrec = kmemdup(ni->mi.mrec, sbi->record_size, GFP_NOFS);
+       if (!mrec)
+               return 0; /* Not critical. */
+
        /* It seems that attribute list can be removed from primary record. */
        mi_remove_attr(NULL, &ni->mi, attr_list);
 
        /*
-        * Repeat the cycle above and move all attributes to primary record.
+        * Repeat the cycle above and copy all attributes to primary record.
+        * Do not remove original attributes from subrecords!
         * It should be success!
         */
        le = NULL;
@@ -707,14 +715,14 @@ static int ni_try_remove_attr_list(struct ntfs_inode *ni)
                mi = ni_find_mi(ni, ino_get(&le->ref));
                if (!mi) {
                        /* Should never happened, 'cause already checked. */
-                       goto bad;
+                       goto out;
                }
 
                attr = mi_find_attr(mi, NULL, le->type, le_name(le),
                                    le->name_len, &le->id);
                if (!attr) {
                        /* Should never happened, 'cause already checked. */
-                       goto bad;
+                       goto out;
                }
                asize = le32_to_cpu(attr->size);
 
@@ -724,18 +732,33 @@ static int ni_try_remove_attr_list(struct ntfs_inode *ni)
                                          le16_to_cpu(attr->name_off));
                if (!attr_ins) {
                        /*
-                        * Internal error.
-                        * Either no space in primary record (already checked).
-                        * Either tried to insert another
-                        * non indexed attribute (logic error).
+                        * No space in primary record (already checked).
                         */
-                       goto bad;
+                       goto out;
                }
 
                /* Copy all except id. */
                id = attr_ins->id;
                memcpy(attr_ins, attr, asize);
                attr_ins->id = id;
+       }
+
+       /*
+        * Repeat the cycle above and remove all attributes from subrecords.
+        */
+       le = NULL;
+       while ((le = al_enumerate(ni, le))) {
+               if (!memcmp(&le->ref, &ref, sizeof(ref)))
+                       continue;
+
+               mi = ni_find_mi(ni, ino_get(&le->ref));
+               if (!mi)
+                       continue;
+
+               attr = mi_find_attr(mi, NULL, le->type, le_name(le),
+                                   le->name_len, &le->id);
+               if (!attr)
+                       continue;
 
                /* Remove from original record. */
                mi_remove_attr(NULL, mi, attr);
@@ -748,11 +771,13 @@ static int ni_try_remove_attr_list(struct ntfs_inode *ni)
        ni->attr_list.le = NULL;
        ni->attr_list.dirty = false;
 
+       kfree(mrec);
+       return 0;
+out:
+       /* Restore primary record. */
+       swap(mrec, ni->mi.mrec);
+       kfree(mrec);
        return 0;
-bad:
-       ntfs_inode_err(&ni->vfs_inode, "Internal error");
-       make_bad_inode(&ni->vfs_inode);
-       return -EINVAL;
 }
 
 /*

diff --git a/fs/ntfs3/record.c b/fs/ntfs3/record.c
index 861e357..8fe0a87 100644 (file)
--- a/fs/ntfs3/record.c
+++ b/fs/ntfs3/record.c
@@ -445,12 +445,11 @@ struct ATTRIB *mi_insert_attr(struct mft_inode *mi, enum ATTR_TYPE type,
        attr = NULL;
        while ((attr = mi_enum_attr(mi, attr))) {
                diff = compare_attr(attr, type, name, name_len, upcase);
-               if (diff > 0)
-                       break;
+
                if (diff < 0)
                        continue;
 
-               if (!is_attr_indexed(attr))
+               if (!diff && !is_attr_indexed(attr))
                        return NULL;
                break;
        }