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path: root/fs/udf/super.c
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Diffstat (limited to 'fs/udf/super.c')
-rw-r--r--fs/udf/super.c139
1 files changed, 76 insertions, 63 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 6f515651a2c2..8f2f56d9a1bb 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -290,12 +290,8 @@ static void udf_free_partition(struct udf_part_map *map)
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
iput(map->s_uspace.s_table);
- if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
- iput(map->s_fspace.s_table);
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
udf_sb_free_bitmap(map->s_uspace.s_bitmap);
- if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
- udf_sb_free_bitmap(map->s_fspace.s_bitmap);
if (map->s_partition_type == UDF_SPARABLE_MAP15)
for (i = 0; i < 4; i++)
brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
@@ -613,14 +609,11 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
struct udf_options uopt;
struct udf_sb_info *sbi = UDF_SB(sb);
int error = 0;
- struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
+
+ if (!(*flags & SB_RDONLY) && UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT))
+ return -EACCES;
sync_filesystem(sb);
- if (lvidiu) {
- int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
- if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & SB_RDONLY))
- return -EACCES;
- }
uopt.flags = sbi->s_flags;
uopt.uid = sbi->s_uid;
@@ -988,12 +981,62 @@ static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
return bitmap;
}
+static int check_partition_desc(struct super_block *sb,
+ struct partitionDesc *p,
+ struct udf_part_map *map)
+{
+ bool umap, utable, fmap, ftable;
+ struct partitionHeaderDesc *phd;
+
+ switch (le32_to_cpu(p->accessType)) {
+ case PD_ACCESS_TYPE_READ_ONLY:
+ case PD_ACCESS_TYPE_WRITE_ONCE:
+ case PD_ACCESS_TYPE_REWRITABLE:
+ case PD_ACCESS_TYPE_NONE:
+ goto force_ro;
+ }
+
+ /* No Partition Header Descriptor? */
+ if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
+ strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
+ goto force_ro;
+
+ phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
+ utable = phd->unallocSpaceTable.extLength;
+ umap = phd->unallocSpaceBitmap.extLength;
+ ftable = phd->freedSpaceTable.extLength;
+ fmap = phd->freedSpaceBitmap.extLength;
+
+ /* No allocation info? */
+ if (!utable && !umap && !ftable && !fmap)
+ goto force_ro;
+
+ /* We don't support blocks that require erasing before overwrite */
+ if (ftable || fmap)
+ goto force_ro;
+ /* UDF 2.60: 2.3.3 - no mixing of tables & bitmaps, no VAT. */
+ if (utable && umap)
+ goto force_ro;
+
+ if (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
+ map->s_partition_type == UDF_VIRTUAL_MAP20)
+ goto force_ro;
+
+ return 0;
+force_ro:
+ if (!sb_rdonly(sb))
+ return -EACCES;
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+ return 0;
+}
+
static int udf_fill_partdesc_info(struct super_block *sb,
struct partitionDesc *p, int p_index)
{
struct udf_part_map *map;
struct udf_sb_info *sbi = UDF_SB(sb);
struct partitionHeaderDesc *phd;
+ int err;
map = &sbi->s_partmaps[p_index];
@@ -1013,8 +1056,16 @@ static int udf_fill_partdesc_info(struct super_block *sb,
p_index, map->s_partition_type,
map->s_partition_root, map->s_partition_len);
- if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
- strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
+ err = check_partition_desc(sb, p, map);
+ if (err)
+ return err;
+
+ /*
+ * Skip loading allocation info it we cannot ever write to the fs.
+ * This is a correctness thing as we may have decided to force ro mount
+ * to avoid allocation info we don't support.
+ */
+ if (UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT))
return 0;
phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
@@ -1050,40 +1101,6 @@ static int udf_fill_partdesc_info(struct super_block *sb,
p_index, bitmap->s_extPosition);
}
- if (phd->partitionIntegrityTable.extLength)
- udf_debug("partitionIntegrityTable (part %d)\n", p_index);
-
- if (phd->freedSpaceTable.extLength) {
- struct kernel_lb_addr loc = {
- .logicalBlockNum = le32_to_cpu(
- phd->freedSpaceTable.extPosition),
- .partitionReferenceNum = p_index,
- };
- struct inode *inode;
-
- inode = udf_iget_special(sb, &loc);
- if (IS_ERR(inode)) {
- udf_debug("cannot load freedSpaceTable (part %d)\n",
- p_index);
- return PTR_ERR(inode);
- }
- map->s_fspace.s_table = inode;
- map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
- udf_debug("freedSpaceTable (part %d) @ %lu\n",
- p_index, map->s_fspace.s_table->i_ino);
- }
-
- if (phd->freedSpaceBitmap.extLength) {
- struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
- if (!bitmap)
- return -ENOMEM;
- map->s_fspace.s_bitmap = bitmap;
- bitmap->s_extPosition = le32_to_cpu(
- phd->freedSpaceBitmap.extPosition);
- map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
- udf_debug("freedSpaceBitmap (part %d) @ %u\n",
- p_index, bitmap->s_extPosition);
- }
return 0;
}
@@ -1257,6 +1274,7 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
ret = -EACCES;
goto out_bh;
}
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
ret = udf_load_vat(sb, i, type1_idx);
if (ret < 0)
goto out_bh;
@@ -2155,10 +2173,12 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
UDF_MAX_READ_VERSION);
ret = -EINVAL;
goto error_out;
- } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
- !sb_rdonly(sb)) {
- ret = -EACCES;
- goto error_out;
+ } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) {
+ if (!sb_rdonly(sb)) {
+ ret = -EACCES;
+ goto error_out;
+ }
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
}
sbi->s_udfrev = minUDFWriteRev;
@@ -2176,10 +2196,12 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
}
if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
- UDF_PART_FLAG_READ_ONLY &&
- !sb_rdonly(sb)) {
- ret = -EACCES;
- goto error_out;
+ UDF_PART_FLAG_READ_ONLY) {
+ if (!sb_rdonly(sb)) {
+ ret = -EACCES;
+ goto error_out;
+ }
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
}
if (udf_find_fileset(sb, &fileset, &rootdir)) {
@@ -2433,10 +2455,6 @@ static unsigned int udf_count_free(struct super_block *sb)
accum += udf_count_free_bitmap(sb,
map->s_uspace.s_bitmap);
}
- if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
- accum += udf_count_free_bitmap(sb,
- map->s_fspace.s_bitmap);
- }
if (accum)
return accum;
@@ -2444,11 +2462,6 @@ static unsigned int udf_count_free(struct super_block *sb)
accum += udf_count_free_table(sb,
map->s_uspace.s_table);
}
- if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
- accum += udf_count_free_table(sb,
- map->s_fspace.s_table);
- }
-
return accum;
}
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-18 13:12:52 +0300