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-rw-r--r--fs/udf/file.c2
-rw-r--r--fs/udf/ialloc.c16
-rw-r--r--fs/udf/inode.c2
-rw-r--r--fs/udf/super.c402
-rw-r--r--fs/udf/udf_sb.h2
5 files changed, 255 insertions, 169 deletions
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 29569dd08168..c02a27a19c6d 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -141,7 +141,7 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
int err, pos;
- size_t count = iocb->ki_left;
+ size_t count = iocb->ki_nbytes;
struct udf_inode_info *iinfo = UDF_I(inode);
down_write(&iinfo->i_data_sem);
diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index 7e5aae4bf46f..6eaf5edf1ea1 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -30,18 +30,17 @@ void udf_free_inode(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
struct udf_sb_info *sbi = UDF_SB(sb);
+ struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
- mutex_lock(&sbi->s_alloc_mutex);
- if (sbi->s_lvid_bh) {
- struct logicalVolIntegrityDescImpUse *lvidiu =
- udf_sb_lvidiu(sbi);
+ if (lvidiu) {
+ mutex_lock(&sbi->s_alloc_mutex);
if (S_ISDIR(inode->i_mode))
le32_add_cpu(&lvidiu->numDirs, -1);
else
le32_add_cpu(&lvidiu->numFiles, -1);
udf_updated_lvid(sb);
+ mutex_unlock(&sbi->s_alloc_mutex);
}
- mutex_unlock(&sbi->s_alloc_mutex);
udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
}
@@ -55,6 +54,7 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode, int *err)
uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
struct udf_inode_info *iinfo;
struct udf_inode_info *dinfo = UDF_I(dir);
+ struct logicalVolIntegrityDescImpUse *lvidiu;
inode = new_inode(sb);
@@ -92,12 +92,10 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode, int *err)
return NULL;
}
- if (sbi->s_lvid_bh) {
- struct logicalVolIntegrityDescImpUse *lvidiu;
-
+ lvidiu = udf_sb_lvidiu(sb);
+ if (lvidiu) {
iinfo->i_unique = lvid_get_unique_id(sb);
mutex_lock(&sbi->s_alloc_mutex);
- lvidiu = udf_sb_lvidiu(sbi);
if (S_ISDIR(mode))
le32_add_cpu(&lvidiu->numDirs, 1);
else
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index b6d15d349810..062b7925bca0 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -172,7 +172,7 @@ static void udf_write_failed(struct address_space *mapping, loff_t to)
loff_t isize = inode->i_size;
if (to > isize) {
- truncate_pagecache(inode, to, isize);
+ truncate_pagecache(inode, isize);
if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
down_write(&iinfo->i_data_sem);
udf_clear_extent_cache(inode);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9ac4057a86c9..91219385691d 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -94,13 +94,25 @@ static unsigned int udf_count_free(struct super_block *);
static int udf_statfs(struct dentry *, struct kstatfs *);
static int udf_show_options(struct seq_file *, struct dentry *);
-struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
+struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
{
- struct logicalVolIntegrityDesc *lvid =
- (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
- __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
- __u32 offset = number_of_partitions * 2 *
- sizeof(uint32_t)/sizeof(uint8_t);
+ struct logicalVolIntegrityDesc *lvid;
+ unsigned int partnum;
+ unsigned int offset;
+
+ if (!UDF_SB(sb)->s_lvid_bh)
+ return NULL;
+ lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
+ partnum = le32_to_cpu(lvid->numOfPartitions);
+ if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
+ offsetof(struct logicalVolIntegrityDesc, impUse)) /
+ (2 * sizeof(uint32_t)) < partnum) {
+ udf_err(sb, "Logical volume integrity descriptor corrupted "
+ "(numOfPartitions = %u)!\n", partnum);
+ return NULL;
+ }
+ /* The offset is to skip freeSpaceTable and sizeTable arrays */
+ offset = partnum * 2 * sizeof(uint32_t);
return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
}
@@ -629,6 +641,13 @@ 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 (lvidiu) {
+ int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
+ if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
+ return -EACCES;
+ }
uopt.flags = sbi->s_flags;
uopt.uid = sbi->s_uid;
@@ -649,12 +668,6 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
sbi->s_dmode = uopt.dmode;
write_unlock(&sbi->s_cred_lock);
- if (sbi->s_lvid_bh) {
- int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
- if (write_rev > UDF_MAX_WRITE_VERSION)
- *flags |= MS_RDONLY;
- }
-
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
goto out_unlock;
@@ -843,27 +856,38 @@ static int udf_find_fileset(struct super_block *sb,
return 1;
}
+/*
+ * Load primary Volume Descriptor Sequence
+ *
+ * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
+ * should be tried.
+ */
static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
{
struct primaryVolDesc *pvoldesc;
struct ustr *instr, *outstr;
struct buffer_head *bh;
uint16_t ident;
- int ret = 1;
+ int ret = -ENOMEM;
instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
if (!instr)
- return 1;
+ return -ENOMEM;
outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
if (!outstr)
goto out1;
bh = udf_read_tagged(sb, block, block, &ident);
- if (!bh)
+ if (!bh) {
+ ret = -EAGAIN;
goto out2;
+ }
- BUG_ON(ident != TAG_IDENT_PVD);
+ if (ident != TAG_IDENT_PVD) {
+ ret = -EIO;
+ goto out_bh;
+ }
pvoldesc = (struct primaryVolDesc *)bh->b_data;
@@ -889,8 +913,9 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
if (udf_CS0toUTF8(outstr, instr))
udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
- brelse(bh);
ret = 0;
+out_bh:
+ brelse(bh);
out2:
kfree(outstr);
out1:
@@ -947,7 +972,7 @@ static int udf_load_metadata_files(struct super_block *sb, int partition)
if (mdata->s_mirror_fe == NULL) {
udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
- goto error_exit;
+ return -EIO;
}
}
@@ -964,23 +989,18 @@ static int udf_load_metadata_files(struct super_block *sb, int partition)
addr.logicalBlockNum, addr.partitionReferenceNum);
mdata->s_bitmap_fe = udf_iget(sb, &addr);
-
if (mdata->s_bitmap_fe == NULL) {
if (sb->s_flags & MS_RDONLY)
udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
else {
udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
- goto error_exit;
+ return -EIO;
}
}
}
udf_debug("udf_load_metadata_files Ok\n");
-
return 0;
-
-error_exit:
- return 1;
}
static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
@@ -1069,7 +1089,7 @@ static int udf_fill_partdesc_info(struct super_block *sb,
if (!map->s_uspace.s_table) {
udf_debug("cannot load unallocSpaceTable (part %d)\n",
p_index);
- return 1;
+ return -EIO;
}
map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
udf_debug("unallocSpaceTable (part %d) @ %ld\n",
@@ -1079,7 +1099,7 @@ static int udf_fill_partdesc_info(struct super_block *sb,
if (phd->unallocSpaceBitmap.extLength) {
struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
if (!bitmap)
- return 1;
+ return -ENOMEM;
map->s_uspace.s_bitmap = bitmap;
bitmap->s_extPosition = le32_to_cpu(
phd->unallocSpaceBitmap.extPosition);
@@ -1102,7 +1122,7 @@ static int udf_fill_partdesc_info(struct super_block *sb,
if (!map->s_fspace.s_table) {
udf_debug("cannot load freedSpaceTable (part %d)\n",
p_index);
- return 1;
+ return -EIO;
}
map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
@@ -1113,7 +1133,7 @@ static int udf_fill_partdesc_info(struct super_block *sb,
if (phd->freedSpaceBitmap.extLength) {
struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
if (!bitmap)
- return 1;
+ return -ENOMEM;
map->s_fspace.s_bitmap = bitmap;
bitmap->s_extPosition = le32_to_cpu(
phd->freedSpaceBitmap.extPosition);
@@ -1165,7 +1185,7 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
}
if (!sbi->s_vat_inode)
- return 1;
+ return -EIO;
if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
map->s_type_specific.s_virtual.s_start_offset = 0;
@@ -1177,7 +1197,7 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
pos = udf_block_map(sbi->s_vat_inode, 0);
bh = sb_bread(sb, pos);
if (!bh)
- return 1;
+ return -EIO;
vat20 = (struct virtualAllocationTable20 *)bh->b_data;
} else {
vat20 = (struct virtualAllocationTable20 *)
@@ -1195,6 +1215,12 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
return 0;
}
+/*
+ * Load partition descriptor block
+ *
+ * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
+ * sequence.
+ */
static int udf_load_partdesc(struct super_block *sb, sector_t block)
{
struct buffer_head *bh;
@@ -1204,13 +1230,15 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
int i, type1_idx;
uint16_t partitionNumber;
uint16_t ident;
- int ret = 0;
+ int ret;
bh = udf_read_tagged(sb, block, block, &ident);
if (!bh)
- return 1;
- if (ident != TAG_IDENT_PD)
+ return -EAGAIN;
+ if (ident != TAG_IDENT_PD) {
+ ret = 0;
goto out_bh;
+ }
p = (struct partitionDesc *)bh->b_data;
partitionNumber = le16_to_cpu(p->partitionNumber);
@@ -1229,10 +1257,13 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
if (i >= sbi->s_partitions) {
udf_debug("Partition (%d) not found in partition map\n",
partitionNumber);
+ ret = 0;
goto out_bh;
}
ret = udf_fill_partdesc_info(sb, p, i);
+ if (ret < 0)
+ goto out_bh;
/*
* Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
@@ -1249,32 +1280,37 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
break;
}
- if (i >= sbi->s_partitions)
+ if (i >= sbi->s_partitions) {
+ ret = 0;
goto out_bh;
+ }
ret = udf_fill_partdesc_info(sb, p, i);
- if (ret)
+ if (ret < 0)
goto out_bh;
if (map->s_partition_type == UDF_METADATA_MAP25) {
ret = udf_load_metadata_files(sb, i);
- if (ret) {
+ if (ret < 0) {
udf_err(sb, "error loading MetaData partition map %d\n",
i);
goto out_bh;
}
} else {
- ret = udf_load_vat(sb, i, type1_idx);
- if (ret)
- goto out_bh;
/*
- * Mark filesystem read-only if we have a partition with
- * virtual map since we don't handle writing to it (we
- * overwrite blocks instead of relocating them).
+ * If we have a partition with virtual map, we don't handle
+ * writing to it (we overwrite blocks instead of relocating
+ * them).
*/
- sb->s_flags |= MS_RDONLY;
- pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n");
+ if (!(sb->s_flags & MS_RDONLY)) {
+ ret = -EACCES;
+ goto out_bh;
+ }
+ ret = udf_load_vat(sb, i, type1_idx);
+ if (ret < 0)
+ goto out_bh;
}
+ ret = 0;
out_bh:
/* In case loading failed, we handle cleanup in udf_fill_super */
brelse(bh);
@@ -1340,11 +1376,11 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
uint16_t ident;
struct buffer_head *bh;
unsigned int table_len;
- int ret = 0;
+ int ret;
bh = udf_read_tagged(sb, block, block, &ident);
if (!bh)
- return 1;
+ return -EAGAIN;
BUG_ON(ident != TAG_IDENT_LVD);
lvd = (struct logicalVolDesc *)bh->b_data;
table_len = le32_to_cpu(lvd->mapTableLength);
@@ -1352,7 +1388,7 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
udf_err(sb, "error loading logical volume descriptor: "
"Partition table too long (%u > %lu)\n", table_len,
sb->s_blocksize - sizeof(*lvd));
- ret = 1;
+ ret = -EIO;
goto out_bh;
}
@@ -1396,11 +1432,10 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
} else if (!strncmp(upm2->partIdent.ident,
UDF_ID_SPARABLE,
strlen(UDF_ID_SPARABLE))) {
- if (udf_load_sparable_map(sb, map,
- (struct sparablePartitionMap *)gpm) < 0) {
- ret = 1;
+ ret = udf_load_sparable_map(sb, map,
+ (struct sparablePartitionMap *)gpm);
+ if (ret < 0)
goto out_bh;
- }
} else if (!strncmp(upm2->partIdent.ident,
UDF_ID_METADATA,
strlen(UDF_ID_METADATA))) {
@@ -1465,7 +1500,7 @@ 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;
out_bh:
brelse(bh);
return ret;
@@ -1503,22 +1538,18 @@ static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_
}
/*
- * udf_process_sequence
- *
- * PURPOSE
- * Process a main/reserve volume descriptor sequence.
+ * Process a main/reserve volume descriptor sequence.
+ * @block First block of first extent of the sequence.
+ * @lastblock Lastblock of first extent of the sequence.
+ * @fileset There we store extent containing root fileset
*
- * PRE-CONDITIONS
- * sb Pointer to _locked_ superblock.
- * block First block of first extent of the sequence.
- * lastblock Lastblock of first extent of the sequence.
- *
- * HISTORY
- * July 1, 1997 - Andrew E. Mileski
- * Written, tested, and released.
+ * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
+ * sequence
*/
-static noinline int udf_process_sequence(struct super_block *sb, long block,
- long lastblock, struct kernel_lb_addr *fileset)
+static noinline int udf_process_sequence(
+ struct super_block *sb,
+ sector_t block, sector_t lastblock,
+ struct kernel_lb_addr *fileset)
{
struct buffer_head *bh = NULL;
struct udf_vds_record vds[VDS_POS_LENGTH];
@@ -1529,6 +1560,7 @@ static noinline int udf_process_sequence(struct super_block *sb, long block,
uint32_t vdsn;
uint16_t ident;
long next_s = 0, next_e = 0;
+ int ret;
memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
@@ -1543,7 +1575,7 @@ static noinline int udf_process_sequence(struct super_block *sb, long block,
udf_err(sb,
"Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
(unsigned long long)block);
- return 1;
+ return -EAGAIN;
}
/* Process each descriptor (ISO 13346 3/8.3-8.4) */
@@ -1616,14 +1648,19 @@ static noinline int udf_process_sequence(struct super_block *sb, long block,
*/
if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
udf_err(sb, "Primary Volume Descriptor not found!\n");
- return 1;
+ return -EAGAIN;
+ }
+ ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
+ if (ret < 0)
+ return ret;
+
+ if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
+ ret = udf_load_logicalvol(sb,
+ vds[VDS_POS_LOGICAL_VOL_DESC].block,
+ fileset);
+ if (ret < 0)
+ return ret;
}
- if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
- return 1;
-
- if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
- vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
- return 1;
if (vds[VDS_POS_PARTITION_DESC].block) {
/*
@@ -1632,19 +1669,27 @@ static noinline int udf_process_sequence(struct super_block *sb, long block,
*/
for (block = vds[VDS_POS_PARTITION_DESC].block;
block < vds[VDS_POS_TERMINATING_DESC].block;
- block++)
- if (udf_load_partdesc(sb, block))
- return 1;
+ block++) {
+ ret = udf_load_partdesc(sb, block);
+ if (ret < 0)
+ return ret;
+ }
}
return 0;
}
+/*
+ * Load Volume Descriptor Sequence described by anchor in bh
+ *
+ * Returns <0 on error, 0 on success
+ */
static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
struct kernel_lb_addr *fileset)
{
struct anchorVolDescPtr *anchor;
- long main_s, main_e, reserve_s, reserve_e;
+ sector_t main_s, main_e, reserve_s, reserve_e;
+ int ret;
anchor = (struct anchorVolDescPtr *)bh->b_data;
@@ -1662,18 +1707,26 @@ static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
/* Process the main & reserve sequences */
/* responsible for finding the PartitionDesc(s) */
- if (!udf_process_sequence(sb, main_s, main_e, fileset))
- return 1;
- udf_sb_free_partitions(sb);
- if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset))
- return 1;
+ ret = udf_process_sequence(sb, main_s, main_e, fileset);
+ if (ret != -EAGAIN)
+ return ret;
udf_sb_free_partitions(sb);
- return 0;
+ ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
+ if (ret < 0) {
+ udf_sb_free_partitions(sb);
+ /* No sequence was OK, return -EIO */
+ if (ret == -EAGAIN)
+ ret = -EIO;
+ }
+ return ret;
}
/*
* Check whether there is an anchor block in the given block and
* load Volume Descriptor Sequence if so.
+ *
+ * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
+ * block
*/
static int udf_check_anchor_block(struct super_block *sb, sector_t block,
struct kernel_lb_addr *fileset)
@@ -1685,33 +1738,40 @@ static int udf_check_anchor_block(struct super_block *sb, sector_t block,
if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
udf_fixed_to_variable(block) >=
sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
- return 0;
+ return -EAGAIN;
bh = udf_read_tagged(sb, block, block, &ident);
if (!bh)
- return 0;
+ return -EAGAIN;
if (ident != TAG_IDENT_AVDP) {
brelse(bh);
- return 0;
+ return -EAGAIN;
}
ret = udf_load_sequence(sb, bh, fileset);
brelse(bh);
return ret;
}
-/* Search for an anchor volume descriptor pointer */
-static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
- struct kernel_lb_addr *fileset)
+/*
+ * Search for an anchor volume descriptor pointer.
+ *
+ * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
+ * of anchors.
+ */
+static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
+ struct kernel_lb_addr *fileset)
{
sector_t last[6];
int i;
struct udf_sb_info *sbi = UDF_SB(sb);
int last_count = 0;
+ int ret;
/* First try user provided anchor */
if (sbi->s_anchor) {
- if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
- return lastblock;
+ ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
+ if (ret != -EAGAIN)
+ return ret;
}
/*
* according to spec, anchor is in either:
@@ -1720,39 +1780,46 @@ static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
* lastblock
* however, if the disc isn't closed, it could be 512.
*/
- if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
- return lastblock;
+ ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
+ if (ret != -EAGAIN)
+ return ret;
/*
* The trouble is which block is the last one. Drives often misreport
* this so we try various possibilities.
*/
- last[last_count++] = lastblock;
- if (lastblock >= 1)
- last[last_count++] = lastblock - 1;
- last[last_count++] = lastblock + 1;
- if (lastblock >= 2)
- last[last_count++] = lastblock - 2;
- if (lastblock >= 150)
- last[last_count++] = lastblock - 150;
- if (lastblock >= 152)
- last[last_count++] = lastblock - 152;
+ last[last_count++] = *lastblock;
+ if (*lastblock >= 1)
+ last[last_count++] = *lastblock - 1;
+ last[last_count++] = *lastblock + 1;
+ if (*lastblock >= 2)
+ last[last_count++] = *lastblock - 2;
+ if (*lastblock >= 150)
+ last[last_count++] = *lastblock - 150;
+ if (*lastblock >= 152)
+ last[last_count++] = *lastblock - 152;
for (i = 0; i < last_count; i++) {
if (last[i] >= sb->s_bdev->bd_inode->i_size >>
sb->s_blocksize_bits)
continue;
- if (udf_check_anchor_block(sb, last[i], fileset))
- return last[i];
+ ret = udf_check_anchor_block(sb, last[i], fileset);
+ if (ret != -EAGAIN) {
+ if (!ret)
+ *lastblock = last[i];
+ return ret;
+ }
if (last[i] < 256)
continue;
- if (udf_check_anchor_block(sb, last[i] - 256, fileset))
- return last[i];
+ ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
+ if (ret != -EAGAIN) {
+ if (!ret)
+ *lastblock = last[i];
+ return ret;
+ }
}
/* Finally try block 512 in case media is open */
- if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
- return last[0];
- return 0;
+ return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
}
/*
@@ -1760,54 +1827,59 @@ static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
* area specified by it. The function expects sbi->s_lastblock to be the last
* block on the media.
*
- * Return 1 if ok, 0 if not found.
- *
+ * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
+ * was not found.
*/
static int udf_find_anchor(struct super_block *sb,
struct kernel_lb_addr *fileset)
{
- sector_t lastblock;
struct udf_sb_info *sbi = UDF_SB(sb);
+ sector_t lastblock = sbi->s_last_block;
+ int ret;
- lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
- if (lastblock)
+ ret = udf_scan_anchors(sb, &lastblock, fileset);
+ if (ret != -EAGAIN)
goto out;
/* No anchor found? Try VARCONV conversion of block numbers */
UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
+ lastblock = udf_variable_to_fixed(sbi->s_last_block);
/* Firstly, we try to not convert number of the last block */
- lastblock = udf_scan_anchors(sb,
- udf_variable_to_fixed(sbi->s_last_block),
- fileset);
- if (lastblock)
+ ret = udf_scan_anchors(sb, &lastblock, fileset);
+ if (ret != -EAGAIN)
goto out;
+ lastblock = sbi->s_last_block;
/* Secondly, we try with converted number of the last block */
- lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
- if (!lastblock) {
+ ret = udf_scan_anchors(sb, &lastblock, fileset);
+ if (ret < 0) {
/* VARCONV didn't help. Clear it. */
UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
- return 0;
}
out:
- sbi->s_last_block = lastblock;
- return 1;
+ if (ret == 0)
+ sbi->s_last_block = lastblock;
+ return ret;
}
/*
* Check Volume Structure Descriptor, find Anchor block and load Volume
- * Descriptor Sequence
+ * Descriptor Sequence.
+ *
+ * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
+ * block was not found.
*/
static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
int silent, struct kernel_lb_addr *fileset)
{
struct udf_sb_info *sbi = UDF_SB(sb);
loff_t nsr_off;
+ int ret;
if (!sb_set_blocksize(sb, uopt->blocksize)) {
if (!silent)
udf_warn(sb, "Bad block size\n");
- return 0;
+ return -EINVAL;
}
sbi->s_last_block = uopt->lastblock;
if (!uopt->novrs) {
@@ -1828,12 +1900,13 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
/* Look for anchor block and load Volume Descriptor Sequence */
sbi->s_anchor = uopt->anchor;
- if (!udf_find_anchor(sb, fileset)) {
- if (!silent)
+ ret = udf_find_anchor(sb, fileset);
+ if (ret < 0) {
+ if (!silent && ret == -EAGAIN)
udf_warn(sb, "No anchor found\n");
- return 0;
+ return ret;
}
- return 1;
+ return 0;
}
static void udf_open_lvid(struct super_block *sb)
@@ -1845,11 +1918,12 @@ static void udf_open_lvid(struct super_block *sb)
if (!bh)
return;
-
- mutex_lock(&sbi->s_alloc_mutex);
lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
- lvidiu = udf_sb_lvidiu(sbi);
+ lvidiu = udf_sb_lvidiu(sb);
+ if (!lvidiu)
+ return;
+ mutex_lock(&sbi->s_alloc_mutex);
lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
@@ -1877,10 +1951,12 @@ static void udf_close_lvid(struct super_block *sb)
if (!bh)
return;
+ lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
+ lvidiu = udf_sb_lvidiu(sb);
+ if (!lvidiu)
+ return;
mutex_lock(&sbi->s_alloc_mutex);
- lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
- lvidiu = udf_sb_lvidiu(sbi);
lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
@@ -1939,7 +2015,7 @@ u64 lvid_get_unique_id(struct super_block *sb)
static int udf_fill_super(struct super_block *sb, void *options, int silent)
{
- int ret;
+ int ret = -EINVAL;
struct inode *inode = NULL;
struct udf_options uopt;
struct kernel_lb_addr rootdir, fileset;
@@ -2011,7 +2087,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
} else {
uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
ret = udf_load_vrs(sb, &uopt, silent, &fileset);
- if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
+ if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
if (!silent)
pr_notice("Rescanning with blocksize %d\n",
UDF_DEFAULT_BLOCKSIZE);
@@ -2021,8 +2097,11 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
ret = udf_load_vrs(sb, &uopt, silent, &fileset);
}
}
- if (!ret) {
- udf_warn(sb, "No partition found (1)\n");
+ if (ret < 0) {
+ if (ret == -EAGAIN) {
+ udf_warn(sb, "No partition found (1)\n");
+ ret = -EINVAL;
+ }
goto error_out;
}
@@ -2030,19 +2109,27 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
if (sbi->s_lvid_bh) {
struct logicalVolIntegrityDescImpUse *lvidiu =
- udf_sb_lvidiu(sbi);
- uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
- uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
- /* uint16_t maxUDFWriteRev =
- le16_to_cpu(lvidiu->maxUDFWriteRev); */
+ udf_sb_lvidiu(sb);
+ uint16_t minUDFReadRev;
+ uint16_t minUDFWriteRev;
+ if (!lvidiu) {
+ ret = -EINVAL;
+ goto error_out;
+ }
+ minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
+ minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
if (minUDFReadRev > UDF_MAX_READ_VERSION) {
udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
- le16_to_cpu(lvidiu->minUDFReadRev),
+ minUDFReadRev,
UDF_MAX_READ_VERSION);
+ ret = -EINVAL;
+ goto error_out;
+ } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
+ !(sb->s_flags & MS_RDONLY)) {
+ ret = -EACCES;
goto error_out;
- } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
- sb->s_flags |= MS_RDONLY;
+ }
sbi->s_udfrev = minUDFWriteRev;
@@ -2054,17 +2141,20 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
if (!sbi->s_partitions) {
udf_warn(sb, "No partition found (2)\n");
+ ret = -EINVAL;
goto error_out;
}
if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
- UDF_PART_FLAG_READ_ONLY) {
- pr_notice("Partition marked readonly; forcing readonly mount\n");
- sb->s_flags |= MS_RDONLY;
+ UDF_PART_FLAG_READ_ONLY &&
+ !(sb->s_flags & MS_RDONLY)) {
+ ret = -EACCES;
+ goto error_out;
}
if (udf_find_fileset(sb, &fileset, &rootdir)) {
udf_warn(sb, "No fileset found\n");
+ ret = -EINVAL;
goto error_out;
}
@@ -2086,6 +2176,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
if (!inode) {
udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
+ ret = -EIO;
goto error_out;
}
@@ -2093,6 +2184,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
sb->s_root = d_make_root(inode);
if (!sb->s_root) {
udf_err(sb, "Couldn't allocate root dentry\n");
+ ret = -ENOMEM;
goto error_out;
}
sb->s_maxbytes = MAX_LFS_FILESIZE;
@@ -2113,7 +2205,7 @@ error_out:
kfree(sbi);
sb->s_fs_info = NULL;
- return -EINVAL;
+ return ret;
}
void _udf_err(struct super_block *sb, const char *function,
@@ -2193,11 +2285,7 @@ static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
struct logicalVolIntegrityDescImpUse *lvidiu;
u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
- if (sbi->s_lvid_bh != NULL)
- lvidiu = udf_sb_lvidiu(sbi);
- else
- lvidiu = NULL;
-
+ lvidiu = udf_sb_lvidiu(sb);
buf->f_type = UDF_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index ed401e94aa8c..1f32c7bd9f57 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -162,7 +162,7 @@ static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
return sb->s_fs_info;
}
-struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
+struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
int udf_compute_nr_groups(struct super_block *sb, u32 partition);
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