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-rw-r--r--fs/udf/super.c51
1 files changed, 33 insertions, 18 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c
index e3d684ea3203..ffd8038ff728 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1474,6 +1474,17 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
if (lvd->integritySeqExt.extLength)
udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
ret = 0;
+
+ if (!sbi->s_lvid_bh) {
+ /* We can't generate unique IDs without a valid LVID */
+ if (sb_rdonly(sb)) {
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+ } else {
+ udf_warn(sb, "Damaged or missing LVID, forcing "
+ "readonly mount\n");
+ ret = -EACCES;
+ }
+ }
out_bh:
brelse(bh);
return ret;
@@ -1943,13 +1954,24 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
return 0;
}
+static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid)
+{
+ struct timespec64 ts;
+
+ ktime_get_real_ts64(&ts);
+ udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
+ lvid->descTag.descCRC = cpu_to_le16(
+ crc_itu_t(0, (char *)lvid + sizeof(struct tag),
+ le16_to_cpu(lvid->descTag.descCRCLength)));
+ lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
+}
+
static void udf_open_lvid(struct super_block *sb)
{
struct udf_sb_info *sbi = UDF_SB(sb);
struct buffer_head *bh = sbi->s_lvid_bh;
struct logicalVolIntegrityDesc *lvid;
struct logicalVolIntegrityDescImpUse *lvidiu;
- struct timespec64 ts;
if (!bh)
return;
@@ -1961,18 +1983,12 @@ static void udf_open_lvid(struct super_block *sb)
mutex_lock(&sbi->s_alloc_mutex);
lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
- ktime_get_real_ts64(&ts);
- udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE)
lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
else
UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT);
- lvid->descTag.descCRC = cpu_to_le16(
- crc_itu_t(0, (char *)lvid + sizeof(struct tag),
- le16_to_cpu(lvid->descTag.descCRCLength)));
-
- lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
+ udf_finalize_lvid(lvid);
mark_buffer_dirty(bh);
sbi->s_lvid_dirty = 0;
mutex_unlock(&sbi->s_alloc_mutex);
@@ -1986,7 +2002,6 @@ static void udf_close_lvid(struct super_block *sb)
struct buffer_head *bh = sbi->s_lvid_bh;
struct logicalVolIntegrityDesc *lvid;
struct logicalVolIntegrityDescImpUse *lvidiu;
- struct timespec64 ts;
if (!bh)
return;
@@ -1998,8 +2013,6 @@ static void udf_close_lvid(struct super_block *sb)
mutex_lock(&sbi->s_alloc_mutex);
lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
- ktime_get_real_ts64(&ts);
- udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
@@ -2009,17 +2022,13 @@ static void udf_close_lvid(struct super_block *sb)
if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT))
lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
- lvid->descTag.descCRC = cpu_to_le16(
- crc_itu_t(0, (char *)lvid + sizeof(struct tag),
- le16_to_cpu(lvid->descTag.descCRCLength)));
-
- lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
/*
* We set buffer uptodate unconditionally here to avoid spurious
* warnings from mark_buffer_dirty() when previous EIO has marked
* the buffer as !uptodate
*/
set_buffer_uptodate(bh);
+ udf_finalize_lvid(lvid);
mark_buffer_dirty(bh);
sbi->s_lvid_dirty = 0;
mutex_unlock(&sbi->s_alloc_mutex);
@@ -2048,8 +2057,8 @@ u64 lvid_get_unique_id(struct super_block *sb)
if (!(++uniqueID & 0xFFFFFFFF))
uniqueID += 16;
lvhd->uniqueID = cpu_to_le64(uniqueID);
+ udf_updated_lvid(sb);
mutex_unlock(&sbi->s_alloc_mutex);
- mark_buffer_dirty(bh);
return ret;
}
@@ -2320,11 +2329,17 @@ static int udf_sync_fs(struct super_block *sb, int wait)
mutex_lock(&sbi->s_alloc_mutex);
if (sbi->s_lvid_dirty) {
+ struct buffer_head *bh = sbi->s_lvid_bh;
+ struct logicalVolIntegrityDesc *lvid;
+
+ lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
+ udf_finalize_lvid(lvid);
+
/*
* Blockdevice will be synced later so we don't have to submit
* the buffer for IO
*/
- mark_buffer_dirty(sbi->s_lvid_bh);
+ mark_buffer_dirty(bh);
sbi->s_lvid_dirty = 0;
}
mutex_unlock(&sbi->s_alloc_mutex);