diff options
Diffstat (limited to 'fs/ntfs3/inode.c')
| -rw-r--r-- | fs/ntfs3/inode.c | 76 |
1 files changed, 23 insertions, 53 deletions
diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index a1e11228dafd..8214970f4594 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -805,6 +805,10 @@ static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) ret = 0; goto out; } + if (is_compressed(ni)) { + ret = 0; + goto out; + } ret = blockdev_direct_IO(iocb, inode, iter, wr ? ntfs_get_block_direct_IO_W : @@ -1025,46 +1029,6 @@ int ntfs_sync_inode(struct inode *inode) } /* - * writeback_inode - Helper function for ntfs_flush_inodes(). - * - * This writes both the inode and the file data blocks, waiting - * for in flight data blocks before the start of the call. It - * does not wait for any io started during the call. - */ -static int writeback_inode(struct inode *inode) -{ - int ret = sync_inode_metadata(inode, 0); - - if (!ret) - ret = filemap_fdatawrite(inode->i_mapping); - return ret; -} - -/* - * ntfs_flush_inodes - * - * Write data and metadata corresponding to i1 and i2. The io is - * started but we do not wait for any of it to finish. - * - * filemap_flush() is used for the block device, so if there is a dirty - * page for a block already in flight, we will not wait and start the - * io over again. - */ -int ntfs_flush_inodes(struct super_block *sb, struct inode *i1, - struct inode *i2) -{ - int ret = 0; - - if (i1) - ret = writeback_inode(i1); - if (!ret && i2) - ret = writeback_inode(i2); - if (!ret) - ret = filemap_flush(sb->s_bdev_file->f_mapping); - return ret; -} - -/* * Helper function to read file. */ int inode_read_data(struct inode *inode, void *data, size_t bytes) @@ -1098,10 +1062,10 @@ int inode_read_data(struct inode *inode, void *data, size_t bytes) * Number of bytes for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK) * for unicode string of @uni_len length. */ -static inline u32 ntfs_reparse_bytes(u32 uni_len) +static inline u32 ntfs_reparse_bytes(u32 uni_len, bool is_absolute) { /* Header + unicode string + decorated unicode string. */ - return sizeof(short) * (2 * uni_len + 4) + + return sizeof(short) * (2 * uni_len + (is_absolute ? 4 : 0)) + offsetof(struct REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer); } @@ -1114,8 +1078,11 @@ ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname, struct REPARSE_DATA_BUFFER *rp; __le16 *rp_name; typeof(rp->SymbolicLinkReparseBuffer) *rs; + bool is_absolute; - rp = kzalloc(ntfs_reparse_bytes(2 * size + 2), GFP_NOFS); + is_absolute = (strlen(symname) > 1 && symname[1] == ':'); + + rp = kzalloc(ntfs_reparse_bytes(2 * size + 2, is_absolute), GFP_NOFS); if (!rp) return ERR_PTR(-ENOMEM); @@ -1130,7 +1097,7 @@ ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname, goto out; /* err = the length of unicode name of symlink. */ - *nsize = ntfs_reparse_bytes(err); + *nsize = ntfs_reparse_bytes(err, is_absolute); if (*nsize > sbi->reparse.max_size) { err = -EFBIG; @@ -1150,7 +1117,7 @@ ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname, /* PrintName + SubstituteName. */ rs->SubstituteNameOffset = cpu_to_le16(sizeof(short) * err); - rs->SubstituteNameLength = cpu_to_le16(sizeof(short) * err + 8); + rs->SubstituteNameLength = cpu_to_le16(sizeof(short) * err + (is_absolute ? 8 : 0)); rs->PrintNameLength = rs->SubstituteNameOffset; /* @@ -1158,16 +1125,18 @@ ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname, * parse this path. * 0-absolute path 1- relative path (SYMLINK_FLAG_RELATIVE). */ - rs->Flags = 0; + rs->Flags = cpu_to_le32(is_absolute ? 0 : SYMLINK_FLAG_RELATIVE); - memmove(rp_name + err + 4, rp_name, sizeof(short) * err); + memmove(rp_name + err + (is_absolute ? 4 : 0), rp_name, sizeof(short) * err); - /* Decorate SubstituteName. */ - rp_name += err; - rp_name[0] = cpu_to_le16('\\'); - rp_name[1] = cpu_to_le16('?'); - rp_name[2] = cpu_to_le16('?'); - rp_name[3] = cpu_to_le16('\\'); + if (is_absolute) { + /* Decorate SubstituteName. */ + rp_name += err; + rp_name[0] = cpu_to_le16('\\'); + rp_name[1] = cpu_to_le16('?'); + rp_name[2] = cpu_to_le16('?'); + rp_name[3] = cpu_to_le16('\\'); + } return rp; out: @@ -2108,5 +2077,6 @@ const struct address_space_operations ntfs_aops_cmpr = { .read_folio = ntfs_read_folio, .readahead = ntfs_readahead, .dirty_folio = block_dirty_folio, + .direct_IO = ntfs_direct_IO, }; // clang-format on |