diff options
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 41 |
1 files changed, 29 insertions, 12 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 98a18ccf3fc0..851390c8d75b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -323,6 +323,8 @@ struct writeback_control; #define IOCB_APPEND (1 << 1) #define IOCB_DIRECT (1 << 2) #define IOCB_HIPRI (1 << 3) +#define IOCB_DSYNC (1 << 4) +#define IOCB_SYNC (1 << 5) struct kiocb { struct file *ki_filp; @@ -394,7 +396,7 @@ struct address_space_operations { void (*invalidatepage) (struct page *, unsigned int, unsigned int); int (*releasepage) (struct page *, gfp_t); void (*freepage)(struct page *); - ssize_t (*direct_IO)(struct kiocb *, struct iov_iter *iter, loff_t offset); + ssize_t (*direct_IO)(struct kiocb *, struct iov_iter *iter); /* * migrate the contents of a page to the specified target. If * migrate_mode is MIGRATE_ASYNC, it must not block. @@ -2515,13 +2517,25 @@ extern int filemap_fdatawrite_range(struct address_space *mapping, extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end, int datasync); extern int vfs_fsync(struct file *file, int datasync); -static inline int generic_write_sync(struct file *file, loff_t pos, loff_t count) -{ - if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host)) - return 0; - return vfs_fsync_range(file, pos, pos + count - 1, - (file->f_flags & __O_SYNC) ? 0 : 1); + +/* + * Sync the bytes written if this was a synchronous write. Expect ki_pos + * to already be updated for the write, and will return either the amount + * of bytes passed in, or an error if syncing the file failed. + */ +static inline ssize_t generic_write_sync(struct kiocb *iocb, ssize_t count) +{ + if (iocb->ki_flags & IOCB_DSYNC) { + int ret = vfs_fsync_range(iocb->ki_filp, + iocb->ki_pos - count, iocb->ki_pos - 1, + (iocb->ki_flags & IOCB_SYNC) ? 0 : 1); + if (ret) + return ret; + } + + return count; } + extern void emergency_sync(void); extern void emergency_remount(void); #ifdef CONFIG_BLOCK @@ -2733,7 +2747,7 @@ extern ssize_t generic_write_checks(struct kiocb *, struct iov_iter *); extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *); extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *); extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *); -extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *, loff_t); +extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *); extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t); ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos); @@ -2796,18 +2810,17 @@ void dio_end_io(struct bio *bio, int error); ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, struct block_device *bdev, struct iov_iter *iter, - loff_t offset, get_block_t get_block, + get_block_t get_block, dio_iodone_t end_io, dio_submit_t submit_io, int flags); static inline ssize_t blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, - struct iov_iter *iter, loff_t offset, + struct iov_iter *iter, get_block_t get_block) { return __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev, iter, - offset, get_block, NULL, NULL, - DIO_LOCKING | DIO_SKIP_HOLES); + get_block, NULL, NULL, DIO_LOCKING | DIO_SKIP_HOLES); } #endif @@ -2973,6 +2986,10 @@ static inline int iocb_flags(struct file *file) res |= IOCB_APPEND; if (io_is_direct(file)) res |= IOCB_DIRECT; + if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host)) + res |= IOCB_DSYNC; + if (file->f_flags & __O_SYNC) + res |= IOCB_SYNC; return res; } |