#define MPAGE_DA_EXTENT_TAIL 0x01
+static __u32 ext4_inode_csum(struct inode *inode, struct ext4_inode *raw,
+ struct ext4_inode_info *ei)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+ __u16 csum_lo;
+ __u16 csum_hi = 0;
+ __u32 csum;
+
+ csum_lo = raw->i_checksum_lo;
+ raw->i_checksum_lo = 0;
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
+ EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi)) {
+ csum_hi = raw->i_checksum_hi;
+ raw->i_checksum_hi = 0;
+ }
+
+ csum = ext4_chksum(sbi, ei->i_csum_seed, (__u8 *)raw,
+ EXT4_INODE_SIZE(inode->i_sb));
+
+ raw->i_checksum_lo = csum_lo;
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
+ EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi))
+ raw->i_checksum_hi = csum_hi;
+
+ return csum;
+}
+
+static int ext4_inode_csum_verify(struct inode *inode, struct ext4_inode *raw,
+ struct ext4_inode_info *ei)
+{
+ __u32 provided, calculated;
+
+ if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
+ cpu_to_le32(EXT4_OS_LINUX) ||
+ !EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ return 1;
+
+ provided = le16_to_cpu(raw->i_checksum_lo);
+ calculated = ext4_inode_csum(inode, raw, ei);
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
+ EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi))
+ provided |= ((__u32)le16_to_cpu(raw->i_checksum_hi)) << 16;
+ else
+ calculated &= 0xFFFF;
+
+ return provided == calculated;
+}
+
+static void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw,
+ struct ext4_inode_info *ei)
+{
+ __u32 csum;
+
+ if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
+ cpu_to_le32(EXT4_OS_LINUX) ||
+ !EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ return;
+
+ csum = ext4_inode_csum(inode, raw, ei);
+ raw->i_checksum_lo = cpu_to_le16(csum & 0xFFFF);
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
+ EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi))
+ raw->i_checksum_hi = cpu_to_le16(csum >> 16);
+}
+
static inline int ext4_begin_ordered_truncate(struct inode *inode,
loff_t new_size)
{
* Try to see if we can get the block without requesting a new
* file system block.
*/
- down_read((&EXT4_I(inode)->i_data_sem));
+ if (!(flags & EXT4_GET_BLOCKS_NO_LOCK))
+ down_read((&EXT4_I(inode)->i_data_sem));
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) {
retval = ext4_ext_map_blocks(handle, inode, map, flags &
EXT4_GET_BLOCKS_KEEP_SIZE);
retval = ext4_ind_map_blocks(handle, inode, map, flags &
EXT4_GET_BLOCKS_KEEP_SIZE);
}
- up_read((&EXT4_I(inode)->i_data_sem));
+ if (!(flags & EXT4_GET_BLOCKS_NO_LOCK))
+ up_read((&EXT4_I(inode)->i_data_sem));
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
int ret = check_block_validity(inode, map);
EXT4_GET_BLOCKS_IO_CREATE_EXT);
}
+static int ext4_get_block_write_nolock(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int flags)
+{
+ handle_t *handle = ext4_journal_current_handle();
+ struct ext4_map_blocks map;
+ int ret = 0;
+
+ ext4_debug("ext4_get_block_write_nolock: inode %lu, flag %d\n",
+ inode->i_ino, flags);
+
+ flags = EXT4_GET_BLOCKS_NO_LOCK;
+
+ map.m_lblk = iblock;
+ map.m_len = bh_result->b_size >> inode->i_blkbits;
+
+ ret = ext4_map_blocks(handle, inode, &map, flags);
+ if (ret > 0) {
+ map_bh(bh_result, inode->i_sb, map.m_pblk);
+ bh_result->b_state = (bh_result->b_state & ~EXT4_MAP_FLAGS) |
+ map.m_flags;
+ bh_result->b_size = inode->i_sb->s_blocksize * map.m_len;
+ ret = 0;
+ }
+ return ret;
+}
+
static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
ssize_t size, void *private, int ret,
bool is_async)
loff_t final_size = offset + count;
if (rw == WRITE && final_size <= inode->i_size) {
+ int overwrite = 0;
+
+ BUG_ON(iocb->private == NULL);
+
+ /* If we do a overwrite dio, i_mutex locking can be released */
+ overwrite = *((int *)iocb->private);
+
+ if (overwrite) {
+ down_read(&EXT4_I(inode)->i_data_sem);
+ mutex_unlock(&inode->i_mutex);
+ }
+
/*
* We could direct write to holes and fallocate.
*
if (!is_sync_kiocb(iocb)) {
ext4_io_end_t *io_end =
ext4_init_io_end(inode, GFP_NOFS);
- if (!io_end)
- return -ENOMEM;
+ if (!io_end) {
+ ret = -ENOMEM;
+ goto retake_lock;
+ }
io_end->flag |= EXT4_IO_END_DIRECT;
iocb->private = io_end;
/*
EXT4_I(inode)->cur_aio_dio = iocb->private;
}
- ret = __blockdev_direct_IO(rw, iocb, inode,
- inode->i_sb->s_bdev, iov,
- offset, nr_segs,
- ext4_get_block_write,
- ext4_end_io_dio,
- NULL,
- DIO_LOCKING);
+ if (overwrite)
+ ret = __blockdev_direct_IO(rw, iocb, inode,
+ inode->i_sb->s_bdev, iov,
+ offset, nr_segs,
+ ext4_get_block_write_nolock,
+ ext4_end_io_dio,
+ NULL,
+ 0);
+ else
+ ret = __blockdev_direct_IO(rw, iocb, inode,
+ inode->i_sb->s_bdev, iov,
+ offset, nr_segs,
+ ext4_get_block_write,
+ ext4_end_io_dio,
+ NULL,
+ DIO_LOCKING);
if (iocb->private)
EXT4_I(inode)->cur_aio_dio = NULL;
/*
if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) {
ext4_free_io_end(iocb->private);
iocb->private = NULL;
- } else if (ret > 0 && ext4_test_inode_state(inode,
+ } else if (ret > 0 && !overwrite && ext4_test_inode_state(inode,
EXT4_STATE_DIO_UNWRITTEN)) {
int err;
/*
ret = err;
ext4_clear_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN);
}
+
+ retake_lock:
+ /* take i_mutex locking again if we do a ovewrite dio */
+ if (overwrite) {
+ up_read(&EXT4_I(inode)->i_data_sem);
+ mutex_lock(&inode->i_mutex);
+ }
+
return ret;
}
b = table;
end = b + EXT4_SB(sb)->s_inode_readahead_blks;
num = EXT4_INODES_PER_GROUP(sb);
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+ if (ext4_has_group_desc_csum(sb))
num -= ext4_itable_unused_count(sb, gdp);
table += num / inodes_per_block;
if (end > table)
journal_t *journal = EXT4_SB(sb)->s_journal;
long ret;
int block;
+ uid_t i_uid;
+ gid_t i_gid;
inode = iget_locked(sb, ino);
if (!inode)
if (ret < 0)
goto bad_inode;
raw_inode = ext4_raw_inode(&iloc);
+
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
+ ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize);
+ if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize >
+ EXT4_INODE_SIZE(inode->i_sb)) {
+ EXT4_ERROR_INODE(inode, "bad extra_isize (%u != %u)",
+ EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize,
+ EXT4_INODE_SIZE(inode->i_sb));
+ ret = -EIO;
+ goto bad_inode;
+ }
+ } else
+ ei->i_extra_isize = 0;
+
+ /* Precompute checksum seed for inode metadata */
+ if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+ struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+ __u32 csum;
+ __le32 inum = cpu_to_le32(inode->i_ino);
+ __le32 gen = raw_inode->i_generation;
+ csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum,
+ sizeof(inum));
+ ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen,
+ sizeof(gen));
+ }
+
+ if (!ext4_inode_csum_verify(inode, raw_inode, ei)) {
+ EXT4_ERROR_INODE(inode, "checksum invalid");
+ ret = -EIO;
+ goto bad_inode;
+ }
+
inode->i_mode = le16_to_cpu(raw_inode->i_mode);
- inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
- inode->i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
+ i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
+ i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low);
if (!(test_opt(inode->i_sb, NO_UID32))) {
- inode->i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
- inode->i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
+ i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16;
+ i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16;
}
+ i_uid_write(inode, i_uid);
+ i_gid_write(inode, i_gid);
set_nlink(inode, le16_to_cpu(raw_inode->i_links_count));
ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */
}
if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
- ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize);
- if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize >
- EXT4_INODE_SIZE(inode->i_sb)) {
- ret = -EIO;
- goto bad_inode;
- }
if (ei->i_extra_isize == 0) {
/* The extra space is currently unused. Use it. */
ei->i_extra_isize = sizeof(struct ext4_inode) -
if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC))
ext4_set_inode_state(inode, EXT4_STATE_XATTR);
}
- } else
- ei->i_extra_isize = 0;
+ }
EXT4_INODE_GET_XTIME(i_ctime, inode, raw_inode);
EXT4_INODE_GET_XTIME(i_mtime, inode, raw_inode);
struct ext4_inode_info *ei = EXT4_I(inode);
struct buffer_head *bh = iloc->bh;
int err = 0, rc, block;
+ uid_t i_uid;
+ gid_t i_gid;
/* For fields not not tracking in the in-memory inode,
* initialise them to zero for new inodes. */
ext4_get_inode_flags(ei);
raw_inode->i_mode = cpu_to_le16(inode->i_mode);
+ i_uid = i_uid_read(inode);
+ i_gid = i_gid_read(inode);
if (!(test_opt(inode->i_sb, NO_UID32))) {
- raw_inode->i_uid_low = cpu_to_le16(low_16_bits(inode->i_uid));
- raw_inode->i_gid_low = cpu_to_le16(low_16_bits(inode->i_gid));
+ raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid));
+ raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid));
/*
* Fix up interoperability with old kernels. Otherwise, old inodes get
* re-used with the upper 16 bits of the uid/gid intact
*/
if (!ei->i_dtime) {
raw_inode->i_uid_high =
- cpu_to_le16(high_16_bits(inode->i_uid));
+ cpu_to_le16(high_16_bits(i_uid));
raw_inode->i_gid_high =
- cpu_to_le16(high_16_bits(inode->i_gid));
+ cpu_to_le16(high_16_bits(i_gid));
} else {
raw_inode->i_uid_high = 0;
raw_inode->i_gid_high = 0;
}
} else {
- raw_inode->i_uid_low =
- cpu_to_le16(fs_high2lowuid(inode->i_uid));
- raw_inode->i_gid_low =
- cpu_to_le16(fs_high2lowgid(inode->i_gid));
+ raw_inode->i_uid_low = cpu_to_le16(fs_high2lowuid(i_uid));
+ raw_inode->i_gid_low = cpu_to_le16(fs_high2lowgid(i_gid));
raw_inode->i_uid_high = 0;
raw_inode->i_gid_high = 0;
}
EXT4_SET_RO_COMPAT_FEATURE(sb,
EXT4_FEATURE_RO_COMPAT_LARGE_FILE);
ext4_handle_sync(handle);
- err = ext4_handle_dirty_super(handle, sb);
+ err = ext4_handle_dirty_super_now(handle, sb);
}
}
raw_inode->i_generation = cpu_to_le32(inode->i_generation);
raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize);
}
+ ext4_inode_csum_set(inode, raw_inode, ei);
+
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
rc = ext4_handle_dirty_metadata(handle, NULL, bh);
if (!err)
if (is_quota_modification(inode, attr))
dquot_initialize(inode);
- if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
- (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
+ if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
+ (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
handle_t *handle;
/* (user+group)*(old+new) structure, inode write (sb,
* will return the blocks that include the delayed allocation
* blocks for this file.
*/
- delalloc_blocks = EXT4_I(inode)->i_reserved_data_blocks;
+ delalloc_blocks = EXT4_C2B(EXT4_SB(inode->i_sb),
+ EXT4_I(inode)->i_reserved_data_blocks);
stat->blocks += (delalloc_blocks << inode->i_sb->s_blocksize_bits)>>9;
return 0;
projects / firefly-linux-kernel-4.4.55.git / blobdiff