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Merge tag 'for_v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull ext2, udf and quota updates from Jan Kara:

 - some ext2 fixes and cleanups

 - a fix of udf bug when extending files

 - a fix of quota Q_XGETQSTAT[V] handling

* tag 'for_v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: Fix incorrect final NOT_ALLOCATED (hole) extent length
  ext2: Use kmemdup rather than duplicating its implementation
  quota: honor quota type in Q_XGETQSTAT[V] calls
  ext2: Always brelse bh on failure in ext2_iget()
  ext2: add missing brelse() in ext2_iget()
  ext2: Fix a typo in ext2_getattr argument
  ext2: fix a typo in comment
  ext2: add missing brelse() in ext2_new_inode()
  ext2: optimize ext2_xattr_get()
  ext2: introduce new helper for xattr entry comparison
  ext2: merge xattr next entry check to ext2_xattr_entry_valid()
  ext2: code cleanup for ext2_preread_inode()
  ext2: code cleanup by using test_opt() and clear_opt()
  doc: ext2: update description of quota options for ext2
  ext2: Strengthen xattr block checks
  ext2: Merge loops in ext2_xattr_set()
  ext2: introduce helper for xattr entry validation
  ext2: introduce helper for xattr header validation
  quota: add dqi_dirty_list description to comment of Dquot List Management
alistair/sunxi64-5.4-dsi
Linus Torvalds 2019-07-10 20:27:07 -07:00
parent e6983afd92 fa33cdbf3e
commit 682f7c5c46
9 changed files with 195 additions and 151 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Documentation/filesystems/ext2.txt
View File

@ -57,7 +57,13 @@ noacl Don't support POSIX ACLs.
nobh Do not attach buffer_heads to file pagecache.
grpquota,noquota,quota,usrquota Quota options are silently ignored by ext2.
quota, usrquota Enable user disk quota support
(requires CONFIG_QUOTA).
grpquota Enable group disk quota support
(requires CONFIG_QUOTA).
noquota option ls silently ignored by ext2.
Specification

3
fs/ext2/balloc.c
View File

@ -1197,7 +1197,7 @@ static int ext2_has_free_blocks(struct ext2_sb_info *sbi)
/*
* Returns 1 if the passed-in block region is valid; 0 if some part overlaps
* with filesystem metadata blocksi.
* with filesystem metadata blocks.
*/
int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
unsigned int count)
@ -1212,7 +1212,6 @@ int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
(start_blk + count >= sbi->s_sb_block))
return 0;
return 1;
}

5
fs/ext2/ialloc.c
View File

@ -172,9 +172,7 @@ static void ext2_preread_inode(struct inode *inode)
struct backing_dev_info *bdi;
bdi = inode_to_bdi(inode);
if (bdi_read_congested(bdi))
return;
if (bdi_write_congested(bdi))
if (bdi_rw_congested(bdi))
return;
block_group = (inode->i_ino - 1) / EXT2_INODES_PER_GROUP(inode->i_sb);
@ -511,6 +509,7 @@ repeat_in_this_group:
/*
* Scanned all blockgroups.
*/
brelse(bitmap_bh);
err = -ENOSPC;
goto fail;
got:

7
fs/ext2/inode.c
View File

@ -1400,7 +1400,7 @@ void ext2_set_file_ops(struct inode *inode)
struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
{
struct ext2_inode_info *ei;
struct buffer_head * bh;
struct buffer_head * bh = NULL;
struct ext2_inode *raw_inode;
struct inode *inode;
long ret = -EIO;
@ -1446,7 +1446,6 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
*/
if (inode->i_nlink == 0 && (inode->i_mode == 0 || ei->i_dtime)) {
/* this inode is deleted */
brelse (bh);
ret = -ESTALE;
goto bad_inode;
}
@ -1463,7 +1462,6 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
!ext2_data_block_valid(EXT2_SB(sb), ei->i_file_acl, 1)) {
ext2_error(sb, "ext2_iget", "bad extended attribute block %u",
ei->i_file_acl);
brelse(bh);
ret = -EFSCORRUPTED;
goto bad_inode;
}
@ -1526,6 +1524,7 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
return inode;
bad_inode:
brelse(bh);
iget_failed(inode);
return ERR_PTR(ret);
}
@ -1640,7 +1639,7 @@ int ext2_write_inode(struct inode *inode, struct writeback_control *wbc)
}
int ext2_getattr(const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_falgs)
u32 request_mask, unsigned int query_flags)
{
struct inode *inode = d_inode(path->dentry);
struct ext2_inode_info *ei = EXT2_I(inode);

17
fs/ext2/super.c
View File

@ -303,16 +303,16 @@ static int ext2_show_options(struct seq_file *seq, struct dentry *root)
if (test_opt(sb, NOBH))
seq_puts(seq, ",nobh");
if (sbi->s_mount_opt & EXT2_MOUNT_USRQUOTA)
if (test_opt(sb, USRQUOTA))
seq_puts(seq, ",usrquota");
if (sbi->s_mount_opt & EXT2_MOUNT_GRPQUOTA)
if (test_opt(sb, GRPQUOTA))
seq_puts(seq, ",grpquota");
if (sbi->s_mount_opt & EXT2_MOUNT_XIP)
if (test_opt(sb, XIP))
seq_puts(seq, ",xip");
if (sbi->s_mount_opt & EXT2_MOUNT_DAX)
if (test_opt(sb, DAX))
seq_puts(seq, ",dax");
if (!test_opt(sb, RESERVATION))
@ -935,8 +935,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_resgid = opts.s_resgid;
sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?
SB_POSIXACL : 0);
(test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
sb->s_iflags |= SB_I_CGROUPWB;
if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV &&
@ -967,11 +966,11 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
if (test_opt(sb, DAX)) {
if (!bdev_dax_supported(sb->s_bdev, blocksize)) {
ext2_msg(sb, KERN_ERR,
"DAX unsupported by block device. Turning off DAX.");
sbi->s_mount_opt &= ~EXT2_MOUNT_DAX;
clear_opt(sbi->s_mount_opt, DAX);
}
}
@ -1404,7 +1403,7 @@ out_set:
sbi->s_resuid = new_opts.s_resuid;
sbi->s_resgid = new_opts.s_resgid;
sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
(test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
spin_unlock(&sbi->s_lock);
return 0;

164
fs/ext2/xattr.c
View File

@ -134,6 +134,53 @@ ext2_xattr_handler(int name_index)
return handler;
}
static bool
ext2_xattr_header_valid(struct ext2_xattr_header *header)
{
if (header->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
header->h_blocks != cpu_to_le32(1))
return false;
return true;
}
static bool
ext2_xattr_entry_valid(struct ext2_xattr_entry *entry,
char *end, size_t end_offs)
{
struct ext2_xattr_entry *next;
size_t size;
next = EXT2_XATTR_NEXT(entry);
if ((char *)next >= end)
return false;
if (entry->e_value_block != 0)
return false;
size = le32_to_cpu(entry->e_value_size);
if (size > end_offs ||
le16_to_cpu(entry->e_value_offs) + size > end_offs)
return false;
return true;
}
static int
ext2_xattr_cmp_entry(int name_index, size_t name_len, const char *name,
struct ext2_xattr_entry *entry)
{
int cmp;
cmp = name_index - entry->e_name_index;
if (!cmp)
cmp = name_len - entry->e_name_len;
if (!cmp)
cmp = memcmp(name, entry->e_name, name_len);
return cmp;
}
/*
* ext2_xattr_get()
*
@ -152,7 +199,7 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name,
struct ext2_xattr_entry *entry;
size_t name_len, size;
char *end;
int error;
int error, not_found;
struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode);
ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld",
@ -176,9 +223,9 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name,
ea_bdebug(bh, "b_count=%d, refcount=%d",
atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));
end = bh->b_data + bh->b_size;
if (HDR(bh)->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
HDR(bh)->h_blocks != cpu_to_le32(1)) {
bad_block: ext2_error(inode->i_sb, "ext2_xattr_get",
if (!ext2_xattr_header_valid(HDR(bh))) {
bad_block:
ext2_error(inode->i_sb, "ext2_xattr_get",
"inode %ld: bad block %d", inode->i_ino,
EXT2_I(inode)->i_file_acl);
error = -EIO;
@ -188,29 +235,25 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_get",
/* find named attribute */
entry = FIRST_ENTRY(bh);
while (!IS_LAST_ENTRY(entry)) {
struct ext2_xattr_entry *next =
EXT2_XATTR_NEXT(entry);
if ((char *)next >= end)
if (!ext2_xattr_entry_valid(entry, end,
inode->i_sb->s_blocksize))
goto bad_block;
if (name_index == entry->e_name_index &&
name_len == entry->e_name_len &&
memcmp(name, entry->e_name, name_len) == 0)
not_found = ext2_xattr_cmp_entry(name_index, name_len, name,
entry);
if (!not_found)
goto found;
entry = next;
if (not_found < 0)
break;
entry = EXT2_XATTR_NEXT(entry);
}
if (ext2_xattr_cache_insert(ea_block_cache, bh))
ea_idebug(inode, "cache insert failed");
error = -ENODATA;
goto cleanup;
found:
/* check the buffer size */
if (entry->e_value_block != 0)
goto bad_block;
size = le32_to_cpu(entry->e_value_size);
if (size > inode->i_sb->s_blocksize ||
le16_to_cpu(entry->e_value_offs) + size > inode->i_sb->s_blocksize)
goto bad_block;
if (ext2_xattr_cache_insert(ea_block_cache, bh))
ea_idebug(inode, "cache insert failed");
if (buffer) {
@ -266,9 +309,9 @@ ext2_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size)
ea_bdebug(bh, "b_count=%d, refcount=%d",
atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));
end = bh->b_data + bh->b_size;
if (HDR(bh)->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
HDR(bh)->h_blocks != cpu_to_le32(1)) {
bad_block: ext2_error(inode->i_sb, "ext2_xattr_list",
if (!ext2_xattr_header_valid(HDR(bh))) {
bad_block:
ext2_error(inode->i_sb, "ext2_xattr_list",
"inode %ld: bad block %d", inode->i_ino,
EXT2_I(inode)->i_file_acl);
error = -EIO;
@ -278,11 +321,10 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_list",
/* check the on-disk data structure */
entry = FIRST_ENTRY(bh);
while (!IS_LAST_ENTRY(entry)) {
struct ext2_xattr_entry *next = EXT2_XATTR_NEXT(entry);
if ((char *)next >= end)
if (!ext2_xattr_entry_valid(entry, end,
inode->i_sb->s_blocksize))
goto bad_block;
entry = next;
entry = EXT2_XATTR_NEXT(entry);
}
if (ext2_xattr_cache_insert(ea_block_cache, bh))
ea_idebug(inode, "cache insert failed");
@ -367,7 +409,7 @@ ext2_xattr_set(struct inode *inode, int name_index, const char *name,
struct super_block *sb = inode->i_sb;
struct buffer_head *bh = NULL;
struct ext2_xattr_header *header = NULL;
struct ext2_xattr_entry *here, *last;
struct ext2_xattr_entry *here = NULL, *last = NULL;
size_t name_len, free, min_offs = sb->s_blocksize;
int not_found = 1, error;
char *end;
@ -406,47 +448,39 @@ ext2_xattr_set(struct inode *inode, int name_index, const char *name,
le32_to_cpu(HDR(bh)->h_refcount));
header = HDR(bh);
end = bh->b_data + bh->b_size;
if (header->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
header->h_blocks != cpu_to_le32(1)) {
bad_block: ext2_error(sb, "ext2_xattr_set",
if (!ext2_xattr_header_valid(header)) {
bad_block:
ext2_error(sb, "ext2_xattr_set",
"inode %ld: bad block %d", inode->i_ino,
EXT2_I(inode)->i_file_acl);
error = -EIO;
goto cleanup;
}
/* Find the named attribute. */
here = FIRST_ENTRY(bh);
while (!IS_LAST_ENTRY(here)) {
struct ext2_xattr_entry *next = EXT2_XATTR_NEXT(here);
if ((char *)next >= end)
goto bad_block;
if (!here->e_value_block && here->e_value_size) {
size_t offs = le16_to_cpu(here->e_value_offs);
if (offs < min_offs)
min_offs = offs;
}
not_found = name_index - here->e_name_index;
if (!not_found)
not_found = name_len - here->e_name_len;
if (!not_found)
not_found = memcmp(name, here->e_name,name_len);
if (not_found <= 0)
break;
here = next;
}
last = here;
/* We still need to compute min_offs and last. */
/*
* Find the named attribute. If not found, 'here' will point
* to entry where the new attribute should be inserted to
* maintain sorting.
*/
last = FIRST_ENTRY(bh);
while (!IS_LAST_ENTRY(last)) {
struct ext2_xattr_entry *next = EXT2_XATTR_NEXT(last);
if ((char *)next >= end)
if (!ext2_xattr_entry_valid(last, end, sb->s_blocksize))
goto bad_block;
if (!last->e_value_block && last->e_value_size) {
if (last->e_value_size) {
size_t offs = le16_to_cpu(last->e_value_offs);
if (offs < min_offs)
min_offs = offs;
}
last = next;
if (not_found > 0) {
not_found = ext2_xattr_cmp_entry(name_index,
name_len,
name, last);
if (not_found <= 0)
here = last;
}
last = EXT2_XATTR_NEXT(last);
}
if (not_found > 0)
here = last;
/* Check whether we have enough space left. */
free = min_offs - ((char*)last - (char*)header) - sizeof(__u32);
@ -454,7 +488,6 @@ bad_block: ext2_error(sb, "ext2_xattr_set",
/* We will use a new extended attribute block. */
free = sb->s_blocksize -
sizeof(struct ext2_xattr_header) - sizeof(__u32);
here = last = NULL; /* avoid gcc uninitialized warning. */
}
if (not_found) {
@ -470,14 +503,7 @@ bad_block: ext2_error(sb, "ext2_xattr_set",
error = -EEXIST;
if (flags & XATTR_CREATE)
goto cleanup;
if (!here->e_value_block && here->e_value_size) {
size_t size = le32_to_cpu(here->e_value_size);
if (le16_to_cpu(here->e_value_offs) + size >
sb->s_blocksize || size > sb->s_blocksize)
goto bad_block;
free += EXT2_XATTR_SIZE(size);
}
free += EXT2_XATTR_SIZE(le32_to_cpu(here->e_value_size));
free += EXT2_XATTR_LEN(name_len);
}
error = -ENOSPC;
@ -506,11 +532,10 @@ bad_block: ext2_error(sb, "ext2_xattr_set",
unlock_buffer(bh);
ea_bdebug(bh, "cloning");
header = kmalloc(bh->b_size, GFP_KERNEL);
header = kmemdup(HDR(bh), bh->b_size, GFP_KERNEL);
error = -ENOMEM;
if (header == NULL)
goto cleanup;
memcpy(header, HDR(bh), bh->b_size);
header->h_refcount = cpu_to_le32(1);
offset = (char *)here - bh->b_data;
@ -542,7 +567,7 @@ bad_block: ext2_error(sb, "ext2_xattr_set",
here->e_name_len = name_len;
memcpy(here->e_name, name, name_len);
} else {
if (!here->e_value_block && here->e_value_size) {
if (here->e_value_size) {
char *first_val = (char *)header + min_offs;
size_t offs = le16_to_cpu(here->e_value_offs);
char *val = (char *)header + offs;
@ -569,7 +594,7 @@ bad_block: ext2_error(sb, "ext2_xattr_set",
last = ENTRY(header+1);
while (!IS_LAST_ENTRY(last)) {
size_t o = le16_to_cpu(last->e_value_offs);
if (!last->e_value_block && o < offs)
if (o < offs)
last->e_value_offs =
cpu_to_le16(o + size);
last = EXT2_XATTR_NEXT(last);
@ -784,8 +809,7 @@ ext2_xattr_delete_inode(struct inode *inode)
goto cleanup;
}
ea_bdebug(bh, "b_count=%d", atomic_read(&(bh->b_count)));
if (HDR(bh)->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
HDR(bh)->h_blocks != cpu_to_le32(1)) {
if (!ext2_xattr_header_valid(HDR(bh))) {
ext2_error(inode->i_sb, "ext2_xattr_delete_inode",
"inode %ld: bad block %d", inode->i_ino,
EXT2_I(inode)->i_file_acl);

11
fs/quota/dquot.c
View File

@ -223,9 +223,9 @@ static void put_quota_format(struct quota_format_type *fmt)
/*
* Dquot List Management:
* The quota code uses three lists for dquot management: the inuse_list,
* free_dquots, and dquot_hash[] array. A single dquot structure may be
* on all three lists, depending on its current state.
* The quota code uses four lists for dquot management: the inuse_list,
* free_dquots, dqi_dirty_list, and dquot_hash[] array. A single dquot
* structure may be on some of those lists, depending on its current state.
*
* All dquots are placed to the end of inuse_list when first created, and this
* list is used for invalidate operation, which must look at every dquot.
@ -236,6 +236,11 @@ static void put_quota_format(struct quota_format_type *fmt)
* dqstats.free_dquots gives the number of dquots on the list. When
* dquot is invalidated it's completely released from memory.
*
* Dirty dquots are added to the dqi_dirty_list of quota_info when mark
* dirtied, and this list is searched when writing dirty dquots back to
* quota file. Note that some filesystems do dirty dquot tracking on their
* own (e.g. in a journal) and thus don't use dqi_dirty_list.
*
* Dquots with a specific identity (device, type and id) are placed on
* one of the dquot_hash[] hash chains. The provides an efficient search
* mechanism to locate a specific dquot.

38
fs/quota/quota.c
View File

@ -331,9 +331,9 @@ static int quota_state_to_flags(struct qc_state *state)
return flags;
}
static int quota_getstate(struct super_block *sb, struct fs_quota_stat *fqs)
static int quota_getstate(struct super_block *sb, int type,
struct fs_quota_stat *fqs)
{
int type;
struct qc_state state;
int ret;
@ -349,14 +349,7 @@ static int quota_getstate(struct super_block *sb, struct fs_quota_stat *fqs)
if (!fqs->qs_flags)
return -ENOSYS;
fqs->qs_incoredqs = state.s_incoredqs;
/*
* GETXSTATE quotactl has space for just one set of time limits so
* report them for the first enabled quota type
*/
for (type = 0; type < MAXQUOTAS; type++)
if (state.s_state[type].flags & QCI_ACCT_ENABLED)
break;
BUG_ON(type == MAXQUOTAS);
fqs->qs_btimelimit = state.s_state[type].spc_timelimit;
fqs->qs_itimelimit = state.s_state[type].ino_timelimit;
fqs->qs_rtbtimelimit = state.s_state[type].rt_spc_timelimit;
@ -391,22 +384,22 @@ static int quota_getstate(struct super_block *sb, struct fs_quota_stat *fqs)
return 0;
}
static int quota_getxstate(struct super_block *sb, void __user *addr)
static int quota_getxstate(struct super_block *sb, int type, void __user *addr)
{
struct fs_quota_stat fqs;
int ret;
if (!sb->s_qcop->get_state)
return -ENOSYS;
ret = quota_getstate(sb, &fqs);
ret = quota_getstate(sb, type, &fqs);
if (!ret && copy_to_user(addr, &fqs, sizeof(fqs)))
return -EFAULT;
return ret;
}
static int quota_getstatev(struct super_block *sb, struct fs_quota_statv *fqs)
static int quota_getstatev(struct super_block *sb, int type,
struct fs_quota_statv *fqs)
{
int type;
struct qc_state state;
int ret;
@ -422,14 +415,7 @@ static int quota_getstatev(struct super_block *sb, struct fs_quota_statv *fqs)
if (!fqs->qs_flags)
return -ENOSYS;
fqs->qs_incoredqs = state.s_incoredqs;
/*
* GETXSTATV quotactl has space for just one set of time limits so
* report them for the first enabled quota type
*/
for (type = 0; type < MAXQUOTAS; type++)
if (state.s_state[type].flags & QCI_ACCT_ENABLED)
break;
BUG_ON(type == MAXQUOTAS);
fqs->qs_btimelimit = state.s_state[type].spc_timelimit;
fqs->qs_itimelimit = state.s_state[type].ino_timelimit;
fqs->qs_rtbtimelimit = state.s_state[type].rt_spc_timelimit;
@ -455,7 +441,7 @@ static int quota_getstatev(struct super_block *sb, struct fs_quota_statv *fqs)
return 0;
}
static int quota_getxstatev(struct super_block *sb, void __user *addr)
static int quota_getxstatev(struct super_block *sb, int type, void __user *addr)
{
struct fs_quota_statv fqs;
int ret;
@ -474,7 +460,7 @@ static int quota_getxstatev(struct super_block *sb, void __user *addr)
default:
return -EINVAL;
}
ret = quota_getstatev(sb, &fqs);
ret = quota_getstatev(sb, type, &fqs);
if (!ret && copy_to_user(addr, &fqs, sizeof(fqs)))
return -EFAULT;
return ret;
@ -744,9 +730,9 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
case Q_XQUOTARM:
return quota_rmxquota(sb, addr);
case Q_XGETQSTAT:
return quota_getxstate(sb, addr);
return quota_getxstate(sb, type, addr);
case Q_XGETQSTATV:
return quota_getxstatev(sb, addr);
return quota_getxstatev(sb, type, addr);
case Q_XSETQLIM:
return quota_setxquota(sb, type, id, addr);
case Q_XGETQUOTA:

93
fs/udf/inode.c
View File

@ -470,13 +470,15 @@ static struct buffer_head *udf_getblk(struct inode *inode, udf_pblk_t block,
return NULL;
}
/* Extend the file by 'blocks' blocks, return the number of extents added */
/* Extend the file with new blocks totaling 'new_block_bytes',
* return the number of extents added
*/
static int udf_do_extend_file(struct inode *inode,
struct extent_position *last_pos,
struct kernel_long_ad *last_ext,
sector_t blocks)
loff_t new_block_bytes)
{
sector_t add;
uint32_t add;
int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
struct super_block *sb = inode->i_sb;
struct kernel_lb_addr prealloc_loc = {};
@ -486,7 +488,7 @@ static int udf_do_extend_file(struct inode *inode,
/* The previous extent is fake and we should not extend by anything
* - there's nothing to do... */
if (!blocks && fake)
if (!new_block_bytes && fake)
return 0;
iinfo = UDF_I(inode);
@ -517,13 +519,12 @@ static int udf_do_extend_file(struct inode *inode,
/* Can we merge with the previous extent? */
if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
EXT_NOT_RECORDED_NOT_ALLOCATED) {
add = ((1 << 30) - sb->s_blocksize -
(last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
sb->s_blocksize_bits;
if (add > blocks)
add = blocks;
blocks -= add;
last_ext->extLength += add << sb->s_blocksize_bits;
add = (1 << 30) - sb->s_blocksize -
(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
if (add > new_block_bytes)
add = new_block_bytes;
new_block_bytes -= add;
last_ext->extLength += add;
}
if (fake) {
@ -544,28 +545,27 @@ static int udf_do_extend_file(struct inode *inode,
}
/* Managed to do everything necessary? */
if (!blocks)
if (!new_block_bytes)
goto out;
/* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
last_ext->extLocation.logicalBlockNum = 0;
last_ext->extLocation.partitionReferenceNum = 0;
add = (1 << (30-sb->s_blocksize_bits)) - 1;
last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
(add << sb->s_blocksize_bits);
add = (1 << 30) - sb->s_blocksize;
last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add;
/* Create enough extents to cover the whole hole */
while (blocks > add) {
blocks -= add;
while (new_block_bytes > add) {
new_block_bytes -= add;
err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
last_ext->extLength, 1);
if (err)
return err;
count++;
}
if (blocks) {
if (new_block_bytes) {
last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
(blocks << sb->s_blocksize_bits);
new_block_bytes;
err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
last_ext->extLength, 1);
if (err)
@ -596,6 +596,24 @@ out:
return count;
}
/* Extend the final block of the file to final_block_len bytes */
static void udf_do_extend_final_block(struct inode *inode,
struct extent_position *last_pos,
struct kernel_long_ad *last_ext,
uint32_t final_block_len)
{
struct super_block *sb = inode->i_sb;
uint32_t added_bytes;
added_bytes = final_block_len -
(last_ext->extLength & (sb->s_blocksize - 1));
last_ext->extLength += added_bytes;
UDF_I(inode)->i_lenExtents += added_bytes;
udf_write_aext(inode, last_pos, &last_ext->extLocation,
last_ext->extLength, 1);
}
static int udf_extend_file(struct inode *inode, loff_t newsize)
{
@ -605,10 +623,12 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
int8_t etype;
struct super_block *sb = inode->i_sb;
sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
unsigned long partial_final_block;
int adsize;
struct udf_inode_info *iinfo = UDF_I(inode);
struct kernel_long_ad extent;
int err;
int err = 0;
int within_final_block;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
adsize = sizeof(struct short_ad);
@ -618,18 +638,8 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
BUG();
etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
within_final_block = (etype != -1);
/* File has extent covering the new size (could happen when extending
* inside a block)? */
if (etype != -1)
return 0;
if (newsize & (sb->s_blocksize - 1))
offset++;
/* Extended file just to the boundary of the last file block? */
if (offset == 0)
return 0;
/* Truncate is extending the file by 'offset' blocks */
if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
(epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
/* File has no extents at all or has empty last
@ -643,7 +653,22 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
&extent.extLength, 0);
extent.extLength |= etype << 30;
}
err = udf_do_extend_file(inode, &epos, &extent, offset);
partial_final_block = newsize & (sb->s_blocksize - 1);
/* File has extent covering the new size (could happen when extending
* inside a block)?
*/
if (within_final_block) {
/* Extending file within the last file block */
udf_do_extend_final_block(inode, &epos, &extent,
partial_final_block);
} else {
loff_t add = ((loff_t)offset << sb->s_blocksize_bits) |
partial_final_block;
err = udf_do_extend_file(inode, &epos, &extent, add);
}
if (err < 0)
goto out;
err = 0;
@ -745,6 +770,7 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
/* Are we beyond EOF? */
if (etype == -1) {
int ret;
loff_t hole_len;
isBeyondEOF = true;
if (count) {
if (c)
@ -760,7 +786,8 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
startnum = (offset > 0);
}
/* Create extents for the hole between EOF and offset */
ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
hole_len = (loff_t)offset << inode->i_blkbits;
ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len);
if (ret < 0) {
*err = ret;
newblock = 0;