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ceph: pre-allocate data structure that tracks caps flushing

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Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng
2015-06-10 17:26:13 +08:00
committed by Ilya Dryomov
parent e548e9b93d
commit f66fd9f095
9 changed files with 103 additions and 16 deletions
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18
fs/ceph/file.c
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@ -939,6 +939,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_osd_client *osdc =
&ceph_sb_to_client(inode->i_sb)->client->osdc;
struct ceph_cap_flush *prealloc_cf;
ssize_t count, written = 0;
int err, want, got;
loff_t pos;
@ -946,6 +947,10 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (ceph_snap(inode) != CEPH_NOSNAP)
return -EROFS;
prealloc_cf = ceph_alloc_cap_flush();
if (!prealloc_cf)
return -ENOMEM;
mutex_lock(&inode->i_mutex);
/* We can write back this queue in page reclaim */
@ -1050,7 +1055,8 @@ retry_snap:
int dirty;
spin_lock(&ci->i_ceph_lock);
ci->i_inline_version = CEPH_INLINE_NONE;
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
&prealloc_cf);
spin_unlock(&ci->i_ceph_lock);
if (dirty)
__mark_inode_dirty(inode, dirty);
@ -1074,6 +1080,7 @@ retry_snap:
out:
mutex_unlock(&inode->i_mutex);
out_unlocked:
ceph_free_cap_flush(prealloc_cf);
current->backing_dev_info = NULL;
return written ? written : err;
}
@ -1270,6 +1277,7 @@ static long ceph_fallocate(struct file *file, int mode,
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_osd_client *osdc =
&ceph_inode_to_client(inode)->client->osdc;
struct ceph_cap_flush *prealloc_cf;
int want, got = 0;
int dirty;
int ret = 0;
@ -1282,6 +1290,10 @@ static long ceph_fallocate(struct file *file, int mode,
if (!S_ISREG(inode->i_mode))
return -EOPNOTSUPP;
prealloc_cf = ceph_alloc_cap_flush();
if (!prealloc_cf)
return -ENOMEM;
mutex_lock(&inode->i_mutex);
if (ceph_snap(inode) != CEPH_NOSNAP) {
@ -1328,7 +1340,8 @@ static long ceph_fallocate(struct file *file, int mode,
if (!ret) {
spin_lock(&ci->i_ceph_lock);
ci->i_inline_version = CEPH_INLINE_NONE;
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
&prealloc_cf);
spin_unlock(&ci->i_ceph_lock);
if (dirty)
__mark_inode_dirty(inode, dirty);
@ -1337,6 +1350,7 @@ static long ceph_fallocate(struct file *file, int mode,
ceph_put_cap_refs(ci, got);
unlock:
mutex_unlock(&inode->i_mutex);
ceph_free_cap_flush(prealloc_cf);
return ret;
}