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| author | Sage Weil <sage@newdream.net> | 2010-05-26 14:31:27 -0700 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2010-08-01 20:11:39 -0700 |
| commit | 33caad324b88f75f42d836735d86feaafb3b40cf (patch) | |
| tree | 57e50ce5bdc181ea296191784c4d57999c51207e | |
| parent | 8c6e9229fc1989cf263a6fcd4ff406d7f473f966 (diff) | |
| download | kernel_samsung_tuna-33caad324b88f75f42d836735d86feaafb3b40cf.zip kernel_samsung_tuna-33caad324b88f75f42d836735d86feaafb3b40cf.tar.gz kernel_samsung_tuna-33caad324b88f75f42d836735d86feaafb3b40cf.tar.bz2 | |
ceph: perform lazy writes when file mode and caps permit
If we have marked a file as "lazy" (using the ceph ioctl), perform buffered
writes when the MDS caps allow it.
Signed-off-by: Sage Weil <sage@newdream.net>
| -rw-r--r-- | fs/ceph/caps.c | 7 | ||||
| -rw-r--r-- | fs/ceph/file.c | 12 |
2 files changed, 11 insertions, 8 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index b81be9a..1a70a3e 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -337,8 +337,7 @@ static struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, int mds) } /* - * Return id of any MDS with a cap, preferably FILE_WR|WRBUFFER|EXCL, else - * -1. + * Return id of any MDS with a cap, preferably FILE_WR|BUFFER|EXCL, else -1. */ static int __ceph_get_cap_mds(struct ceph_inode_info *ci, u32 *mseq) { @@ -346,7 +345,7 @@ static int __ceph_get_cap_mds(struct ceph_inode_info *ci, u32 *mseq) int mds = -1; struct rb_node *p; - /* prefer mds with WR|WRBUFFER|EXCL caps */ + /* prefer mds with WR|BUFFER|EXCL caps */ for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { cap = rb_entry(p, struct ceph_cap, ci_node); mds = cap->mds; @@ -831,7 +830,7 @@ int __ceph_caps_file_wanted(struct ceph_inode_info *ci) { int want = 0; int mode; - for (mode = 0; mode < 4; mode++) + for (mode = 0; mode < CEPH_FILE_MODE_NUM; mode++) if (ci->i_nr_by_mode[mode]) want |= ceph_caps_for_mode(mode); return want; diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 7c08698..85c86ed5 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -807,11 +807,12 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) { struct file *file = iocb->ki_filp; + struct ceph_file_info *fi = file->private_data; struct inode *inode = file->f_dentry->d_inode; struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_osd_client *osdc = &ceph_sb_to_client(inode->i_sb)->osdc; loff_t endoff = pos + iov->iov_len; - int got = 0; + int want, got = 0; int ret, err; if (ceph_snap(inode) != CEPH_NOSNAP) @@ -824,8 +825,11 @@ retry_snap: dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n", inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len, inode->i_size); - ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER, - &got, endoff); + if (fi->fmode & CEPH_FILE_MODE_LAZY) + want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; + else + want = CEPH_CAP_FILE_BUFFER; + ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, endoff); if (ret < 0) goto out; @@ -833,7 +837,7 @@ retry_snap: inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len, ceph_cap_string(got)); - if ((got & CEPH_CAP_FILE_BUFFER) == 0 || + 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)) { ret = ceph_sync_write(file, iov->iov_base, iov->iov_len, |