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Fix edge case when i_size doesn't get fixed until second e2fsck run
[tools/e2fsprogs.git] / e2fsck / pass2.c
index 8703a01..e581099 100644 (file)
  *     - The inode_reg_map bitmap
  */
 
+#define _GNU_SOURCE 1 /* get strnlen() */
+#include <string.h>
+
 #include "e2fsck.h"
 #include "problem.h"
+#include "dict.h"
 
 #ifdef NO_INLINE_FUNCS
 #define _INLINE_
@@ -93,7 +97,7 @@ void e2fsck_pass2(e2fsck_t ctx)
        struct check_dir_struct cd;
        struct dx_dir_info      *dx_dir;
        struct dx_dirblock_info *dx_db, *dx_parent;
-       blk_t                   b;
+       int                     b;
        int                     i, depth;
        problem_t               code;
        int                     bad_dir;
@@ -239,16 +243,9 @@ void e2fsck_pass2(e2fsck_t ctx)
                        clear_htree(ctx, dx_dir->ino);
                        dx_dir->numblocks = 0;
                }
-#ifdef ENABLE_HTREE_CLEAR
-               if (dx_dir->numblocks) {
-                       fix_problem(ctx, PR_2_HTREE_FCLR, &pctx);
-                       clear_htree(ctx, dx_dir->ino);
-                       dx_dir->numblocks = 0;
-               }
-#endif
        }
 #endif
-       ext2fs_free_mem((void **) &buf);
+       ext2fs_free_mem(&buf);
        ext2fs_free_dblist(fs->dblist);
 
        if (ctx->inode_bad_map) {
@@ -305,6 +302,21 @@ static int htree_depth(struct dx_dir_info *dx_dir,
        return depth;
 }
 
+static int dict_de_cmp(const void *a, const void *b)
+{
+       const struct ext2_dir_entry *de_a, *de_b;
+       int     a_len, b_len;
+
+       de_a = (const struct ext2_dir_entry *) a;
+       a_len = de_a->name_len & 0xFF;
+       de_b = (const struct ext2_dir_entry *) b;
+       b_len = de_b->name_len & 0xFF;
+
+       if (a_len != b_len)
+               return (a_len - b_len);
+
+       return strncmp(de_a->name, de_b->name, a_len);
+}
 
 /*
  * This is special sort function that makes sure that directory blocks
@@ -441,7 +453,8 @@ static int check_dotdot(e2fsck_t ctx,
  */
 static int check_name(e2fsck_t ctx,
                      struct ext2_dir_entry *dirent,
-                     ext2_ino_t dir_ino, struct problem_context *pctx)
+                     ext2_ino_t dir_ino EXT2FS_ATTR((unused)), 
+                     struct problem_context *pctx)
 {
        int     i;
        int     fixup = -1;
@@ -465,8 +478,9 @@ static int check_name(e2fsck_t ctx,
  * Check the directory filetype (if present)
  */
 static _INLINE_ int check_filetype(e2fsck_t ctx,
-                     struct ext2_dir_entry *dirent,
-                     ext2_ino_t dir_ino, struct problem_context *pctx)
+                                  struct ext2_dir_entry *dirent,
+                                  ext2_ino_t dir_ino EXT2FS_ATTR((unused)),
+                                  struct problem_context *pctx)
 {
        int     filetype = dirent->name_len >> 8;
        int     should_be = EXT2_FT_UNKNOWN;
@@ -529,7 +543,7 @@ static void parse_int_node(ext2_filsys fs,
                
 #ifdef DX_DEBUG
                printf("Root node dump:\n");
-               printf("\t Reserved zero: %d\n", root->reserved_zero);
+               printf("\t Reserved zero: %u\n", root->reserved_zero);
                printf("\t Hash Version: %d\n", root->hash_version);
                printf("\t Info length: %d\n", root->info_length);
                printf("\t Indirect levels: %d\n", root->indirect_levels);
@@ -568,16 +582,17 @@ static void parse_int_node(ext2_filsys fs,
                prev_hash = hash;
                hash = i ? (ext2fs_le32_to_cpu(ent[i].hash) & ~1) : 0;
 #ifdef DX_DEBUG
-               printf("Entry #%d: Hash 0x%08x, block %d\n", i,
+               printf("Entry #%d: Hash 0x%08x, block %u\n", i,
                       hash, ext2fs_le32_to_cpu(ent[i].block));
 #endif
                blk = ext2fs_le32_to_cpu(ent[i].block) & 0x0ffffff;
                /* Check to make sure the block is valid */
-               if (blk > dx_dir->numblocks) {
+               if (blk >= (blk_t) dx_dir->numblocks) {
                        cd->pctx.blk = blk;
                        if (fix_problem(cd->ctx, PR_2_HTREE_BADBLK,
                                        &cd->pctx))
                                goto clear_and_exit;
+                       continue;
                }
                if (hash < prev_hash &&
                    fix_problem(cd->ctx, PR_2_HTREE_HASH_ORDER, &cd->pctx))
@@ -626,11 +641,11 @@ clear_and_exit:
 static void salvage_directory(ext2_filsys fs,
                              struct ext2_dir_entry *dirent,
                              struct ext2_dir_entry *prev,
-                             int *offset)
+                             unsigned int *offset)
 {
        char    *cp = (char *) dirent;
        int left = fs->blocksize - *offset - dirent->rec_len;
-       int name_len = dirent->name_len & 0xFF;
+       unsigned int name_len = dirent->name_len & 0xFF;
 
        /*
         * Special case of directory entry of size 8: copy what's left
@@ -647,7 +662,7 @@ static void salvage_directory(ext2_filsys fs,
         * record length.
         */
        if ((left < 0) &&
-           (name_len + 8 <= dirent->rec_len + left) &&
+           (name_len + 8 <= dirent->rec_len + (unsigned) left) &&
            dirent->inode <= fs->super->s_inodes_count &&
            strnlen(dirent->name, name_len) == name_len) {
                dirent->rec_len += left;
@@ -690,7 +705,7 @@ static int check_dir_block(ext2_filsys fs,
 #endif /* ENABLE_HTREE */
        struct ext2_dir_entry   *dirent, *prev;
        ext2_dirhash_t          hash;
-       int                     offset = 0;
+       unsigned int            offset = 0;
        int                     dir_modified = 0;
        int                     dot_state;
        blk_t                   block_nr = db->blk;
@@ -702,6 +717,9 @@ static int check_dir_block(ext2_filsys fs,
        int                     problem;
        struct ext2_dx_root_info *root;
        struct ext2_dx_countlimit *limit;
+       static dict_t de_dict;
+       struct problem_context  pctx;
+       int     dups_found = 0;
 
        cd = (struct check_dir_struct *) priv_data;
        buf = cd->buf;
@@ -738,6 +756,10 @@ static int check_dir_block(ext2_filsys fs,
        else
                dot_state = 0;
 
+       if (ctx->dirs_to_hash &&
+           ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
+               dups_found++;
+
 #if 0
        printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
               db->blockcnt, ino);
@@ -779,8 +801,11 @@ static int check_dir_block(ext2_filsys fs,
                                clear_htree(ctx, ino);
                                dx_dir->numblocks = 0;
                                dx_db = 0;
-                       } 
+                       }
                        dx_dir->hashversion = root->hash_version;
+                       if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
+                           (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
+                               dx_dir->hashversion += 3;
                        dx_dir->depth = root->indirect_levels + 1;
                } else if ((dirent->inode == 0) &&
                           (dirent->rec_len == fs->blocksize) &&
@@ -792,6 +817,7 @@ static int check_dir_block(ext2_filsys fs,
        }
 #endif /* ENABLE_HTREE */
 
+       dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
        prev = 0;
        do {
                problem = 0;
@@ -807,7 +833,7 @@ static int check_dir_block(ext2_filsys fs,
                                dir_modified++;
                                continue;
                        } else
-                               return DIRENT_ABORT;
+                               goto abort_free_dict;
                }
                if ((dirent->name_len & 0xFF) > EXT2_NAME_LEN) {
                        if (fix_problem(ctx, PR_2_FILENAME_LONG, &cd->pctx)) {
@@ -823,8 +849,7 @@ static int check_dir_block(ext2_filsys fs,
                        dir = e2fsck_get_dir_info(ctx, ino);
                        if (!dir) {
                                fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
-                               ctx->flags |= E2F_FLAG_ABORT;
-                               return DIRENT_ABORT;
+                               goto abort_free_dict;
                        }
                        if (check_dotdot(ctx, dirent, dir, &cd->pctx))
                                dir_modified++;
@@ -960,8 +985,7 @@ static int check_dir_block(ext2_filsys fs,
                        if (!subdir) {
                                cd->pctx.ino = dirent->inode;
                                fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
-                               ctx->flags |= E2F_FLAG_ABORT;
-                               return DIRENT_ABORT;
+                               goto abort_free_dict;
                        }
                        if (subdir->parent) {
                                cd->pctx.ino2 = subdir->parent;
@@ -975,6 +999,21 @@ static int check_dir_block(ext2_filsys fs,
                        } else
                                subdir->parent = ino;
                }
+
+               if (dups_found) {
+                       ;
+               } else if (dict_lookup(&de_dict, dirent)) {
+                       clear_problem_context(&pctx);
+                       pctx.ino = ino;
+                       pctx.dirent = dirent;
+                       fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
+                       if (!ctx->dirs_to_hash)
+                               ext2fs_u32_list_create(&ctx->dirs_to_hash, 50);
+                       if (ctx->dirs_to_hash)
+                               ext2fs_u32_list_add(ctx->dirs_to_hash, ino);
+                       dups_found++;
+               } else
+                       dict_alloc_insert(&de_dict, dirent, dirent);
                
                ext2fs_icount_increment(ctx->inode_count, dirent->inode,
                                        &links);
@@ -1013,14 +1052,17 @@ static int check_dir_block(ext2_filsys fs,
                cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf);
                if (cd->pctx.errcode) {
                        if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
-                                        &cd->pctx)) {
-                               ctx->flags |= E2F_FLAG_ABORT;
-                               return DIRENT_ABORT;
-                       }
+                                        &cd->pctx))
+                               goto abort_free_dict;
                }
                ext2fs_mark_changed(fs);
        }
+       dict_free_nodes(&de_dict);
        return 0;
+abort_free_dict:
+       dict_free_nodes(&de_dict);
+       ctx->flags |= E2F_FLAG_ABORT;
+       return DIRENT_ABORT;
 }
 
 /*
@@ -1029,15 +1071,18 @@ static int check_dir_block(ext2_filsys fs,
  */
 static int deallocate_inode_block(ext2_filsys fs,
                                  blk_t *block_nr,
-                                 e2_blkcnt_t blockcnt,
-                                 blk_t ref_block,
-                                 int ref_offset
+                                 e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
+                                 blk_t ref_block EXT2FS_ATTR((unused)),
+                                 int ref_offset EXT2FS_ATTR((unused)),
                                  void *priv_data)
 {
        e2fsck_t        ctx = (e2fsck_t) priv_data;
        
        if (HOLE_BLKADDR(*block_nr))
                return 0;
+       if ((*block_nr < fs->super->s_first_data_block) ||
+           (*block_nr >= fs->super->s_blocks_count))
+               return 0;
        ext2fs_unmark_block_bitmap(ctx->block_found_map, *block_nr);
        ext2fs_block_alloc_stats(fs, *block_nr, -1);
        return 0;
@@ -1056,7 +1101,7 @@ static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
        ext2fs_icount_store(ctx->inode_link_info, ino, 0);
        e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
        inode.i_links_count = 0;
-       inode.i_dtime = time(0);
+       inode.i_dtime = ctx->now;
        e2fsck_write_inode(ctx, ino, &inode, "deallocate_inode");
        clear_problem_context(&pctx);
        pctx.ino = ino;
@@ -1130,6 +1175,7 @@ extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
        ext2_filsys fs = ctx->fs;
        struct ext2_inode       inode;
        int                     inode_modified = 0;
+       int                     not_fixed = 0;
        unsigned char           *frag, *fsize;
        struct problem_context  pctx;
        int     problem = 0;
@@ -1141,6 +1187,31 @@ extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
        pctx.dir = dir;
        pctx.inode = &inode;
 
+       if (inode.i_file_acl &&
+           !(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
+               if (fix_problem(ctx, PR_2_FILE_ACL_ZERO, &pctx)) {
+                       inode.i_file_acl = 0;
+#ifdef EXT2FS_ENABLE_SWAPFS
+                       /* 
+                        * This is a special kludge to deal with long
+                        * symlinks on big endian systems.  i_blocks
+                        * had already been decremented earlier in
+                        * pass 1, but since i_file_acl hadn't yet
+                        * been cleared, ext2fs_read_inode() assumed
+                        * that the file was short symlink and would
+                        * not have byte swapped i_block[0].  Hence,
+                        * we have to byte-swap it here.
+                        */
+                       if (LINUX_S_ISLNK(inode.i_mode) &&
+                           (fs->flags & EXT2_FLAG_SWAP_BYTES) &&
+                           (inode.i_blocks == fs->blocksize >> 9))
+                               inode.i_block[0] = ext2fs_swab32(inode.i_block[0]);
+#endif
+                       inode_modified++;
+               } else
+                       not_fixed++;
+       }
+
        if (!LINUX_S_ISDIR(inode.i_mode) && !LINUX_S_ISREG(inode.i_mode) &&
            !LINUX_S_ISCHR(inode.i_mode) && !LINUX_S_ISBLK(inode.i_mode) &&
            !LINUX_S_ISLNK(inode.i_mode) && !LINUX_S_ISFIFO(inode.i_mode) &&
@@ -1169,21 +1240,20 @@ extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
                        if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
                                return 0;
                        return 1;
-               }
+               } else
+                       not_fixed++;
                problem = 0;
        }
                
-       if (inode.i_faddr &&
-           fix_problem(ctx, PR_2_FADDR_ZERO, &pctx)) {
-               inode.i_faddr = 0;
-               inode_modified++;
+       if (inode.i_faddr) {
+               if (fix_problem(ctx, PR_2_FADDR_ZERO, &pctx)) {
+                       inode.i_faddr = 0;
+                       inode_modified++;
+               } else
+                       not_fixed++;
        }
 
        switch (fs->super->s_creator_os) {
-           case EXT2_OS_LINUX:
-               frag = &inode.osd2.linux2.l_i_frag;
-               fsize = &inode.osd2.linux2.l_i_fsize;
-               break;
            case EXT2_OS_HURD:
                frag = &inode.osd2.hurd2.h_i_frag;
                fsize = &inode.osd2.hurd2.h_i_fsize;
@@ -1200,7 +1270,8 @@ extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
                if (fix_problem(ctx, PR_2_FRAG_ZERO, &pctx)) {
                        *frag = 0;
                        inode_modified++;
-               }
+               } else
+                       not_fixed++;
                pctx.num = 0;
        }
        if (fsize && *fsize) {
@@ -1208,31 +1279,44 @@ extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
                if (fix_problem(ctx, PR_2_FSIZE_ZERO, &pctx)) {
                        *fsize = 0;
                        inode_modified++;
-               }
+               } else
+                       not_fixed++;
                pctx.num = 0;
        }
 
-       if (inode.i_file_acl &&
-           !(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR) &&
-           fix_problem(ctx, PR_2_FILE_ACL_ZERO, &pctx)) {
-               inode.i_file_acl = 0;
-               inode_modified++;
+       if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
+           !(fs->super->s_feature_ro_compat & 
+             EXT4_FEATURE_RO_COMPAT_HUGE_FILE) &&
+           (inode.osd2.linux2.l_i_blocks_hi != 0)) {
+               pctx.num = inode.osd2.linux2.l_i_blocks_hi;
+               if (fix_problem(ctx, PR_2_BLOCKS_HI_ZERO, &pctx)) {
+                       inode.osd2.linux2.l_i_blocks_hi = 0;
+                       inode_modified++;
+               }
        }
+
        if (inode.i_file_acl &&
            ((inode.i_file_acl < fs->super->s_first_data_block) ||
-            (inode.i_file_acl >= fs->super->s_blocks_count)) &&
-           fix_problem(ctx, PR_2_FILE_ACL_BAD, &pctx)) {
-               inode.i_file_acl = 0;
-               inode_modified++;
+            (inode.i_file_acl >= fs->super->s_blocks_count))) {
+               if (fix_problem(ctx, PR_2_FILE_ACL_BAD, &pctx)) {
+                       inode.i_file_acl = 0;
+                       inode_modified++;
+               } else
+                       not_fixed++;
        }
        if (inode.i_dir_acl &&
-           LINUX_S_ISDIR(inode.i_mode) &&
-           fix_problem(ctx, PR_2_DIR_ACL_ZERO, &pctx)) {
-               inode.i_dir_acl = 0;
-               inode_modified++;
+           LINUX_S_ISDIR(inode.i_mode)) {
+               if (fix_problem(ctx, PR_2_DIR_ACL_ZERO, &pctx)) {
+                       inode.i_dir_acl = 0;
+                       inode_modified++;
+               } else
+                       not_fixed++;
        }
+
        if (inode_modified)
                e2fsck_write_inode(ctx, ino, &inode, "process_bad_inode");
+       if (!not_fixed && ctx->inode_bad_map)
+               ext2fs_unmark_inode_bitmap(ctx->inode_bad_map, ino);
        return 0;
 }
 
@@ -1245,7 +1329,8 @@ extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
  */
 static int allocate_dir_block(e2fsck_t ctx,
                              struct ext2_db_entry *db,
-                             char *buf, struct problem_context *pctx)
+                             char *buf EXT2FS_ATTR((unused)), 
+                             struct problem_context *pctx)
 {
        ext2_filsys fs = ctx->fs;
        blk_t                   blk;
@@ -1290,7 +1375,7 @@ static int allocate_dir_block(e2fsck_t ctx,
        }
 
        pctx->errcode = ext2fs_write_dir_block(fs, blk, block);
-       ext2fs_free_mem((void **) &block);
+       ext2fs_free_mem(&block);
        if (pctx->errcode) {
                pctx->str = "ext2fs_write_dir_block";
                fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
@@ -1324,11 +1409,11 @@ static int allocate_dir_block(e2fsck_t ctx,
 /*
  * This is a helper function for allocate_dir_block().
  */
-static int update_dir_block(ext2_filsys fs,
+static int update_dir_block(ext2_filsys fs EXT2FS_ATTR((unused)),
                            blk_t       *block_nr,
                            e2_blkcnt_t blockcnt,
-                           blk_t ref_block,
-                           int ref_offset, 
+                           blk_t ref_block EXT2FS_ATTR((unused)),
+                           int ref_offset EXT2FS_ATTR((unused))
                            void *priv_data)
 {
        struct ext2_db_entry *db;