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| author | Sage Weil <sage@newdream.net> | 2011-07-26 11:26:07 -0700 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-07-26 11:26:07 -0700 |
| commit | 4918b6d140c4822201ebbe2f070875332aff337b (patch) | |
| tree | 0327a0a68acd2f8209893b4770ba3c9d9264041c | |
| parent | 252c6728de604d6a897d85e212996811d5c8c46c (diff) | |
| download | linux-stable-4918b6d140c4822201ebbe2f070875332aff337b.tar.gz linux-stable-4918b6d140c4822201ebbe2f070875332aff337b.tar.bz2 linux-stable-4918b6d140c4822201ebbe2f070875332aff337b.zip | |
ceph: add F_SYNC file flag to force sync (non-O_DIRECT) io
This allows us to force IO through the sync path which you normally only
get when multiple clients are reading/writing to the same file or by
mounting with -o sync. Among other things, this lets test programs verify
correctness with a single mount.
Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
| -rw-r--r-- | fs/ceph/file.c | 6 | ||||
| -rw-r--r-- | fs/ceph/ioctl.c | 11 | ||||
| -rw-r--r-- | fs/ceph/ioctl.h | 1 | ||||
| -rw-r--r-- | fs/ceph/super.h | 2 |
4 files changed, 18 insertions, 2 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 4698a5c553dc..44e4fe9fba02 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -643,7 +643,8 @@ again: if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || (iocb->ki_filp->f_flags & O_DIRECT) || - (inode->i_sb->s_flags & MS_SYNCHRONOUS)) + (inode->i_sb->s_flags & MS_SYNCHRONOUS) || + (fi->flags & CEPH_F_SYNC)) /* hmm, this isn't really async... */ ret = ceph_sync_read(filp, base, len, ppos, &checkeof); else @@ -720,7 +721,8 @@ retry_snap: if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || (iocb->ki_filp->f_flags & O_DIRECT) || - (inode->i_sb->s_flags & MS_SYNCHRONOUS)) { + (inode->i_sb->s_flags & MS_SYNCHRONOUS) || + (fi->flags & CEPH_F_SYNC)) { ret = ceph_sync_write(file, iov->iov_base, iov->iov_len, &iocb->ki_pos); } else { diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c index ef0b5f48e13a..a757a5680578 100644 --- a/fs/ceph/ioctl.c +++ b/fs/ceph/ioctl.c @@ -231,6 +231,14 @@ static long ceph_ioctl_lazyio(struct file *file) return 0; } +static long ceph_ioctl_syncio(struct file *file) +{ + struct ceph_file_info *fi = file->private_data; + + fi->flags |= CEPH_F_SYNC; + return 0; +} + long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); @@ -249,6 +257,9 @@ long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case CEPH_IOC_LAZYIO: return ceph_ioctl_lazyio(file); + + case CEPH_IOC_SYNCIO: + return ceph_ioctl_syncio(file); } return -ENOTTY; diff --git a/fs/ceph/ioctl.h b/fs/ceph/ioctl.h index 52e8fd74d450..0c5167e43180 100644 --- a/fs/ceph/ioctl.h +++ b/fs/ceph/ioctl.h @@ -40,5 +40,6 @@ struct ceph_ioctl_dataloc { struct ceph_ioctl_dataloc) #define CEPH_IOC_LAZYIO _IO(CEPH_IOCTL_MAGIC, 4) +#define CEPH_IOC_SYNCIO _IO(CEPH_IOCTL_MAGIC, 5) #endif diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 8febe6fce2b1..cdb17d36755c 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -543,6 +543,8 @@ extern void ceph_reservation_status(struct ceph_fs_client *client, /* * we keep buffered readdir results attached to file->private_data */ +#define CEPH_F_SYNC 1 + struct ceph_file_info { short fmode; /* initialized on open */ short flags; /* CEPH_F_* */ |