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ceph: convert inline data to normal data before data write

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Before any data write, convert inline data to normal data and set
i_inline_version to CEPH_INLINE_NONE. The OSD request that saves
inline data to object contains 3 operations (CMPXATTR, WRITE and
SETXATTR). It compares a xattr named 'inline_version' to prevent
old data overwrites newer data.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng
2014-11-14 22:38:29 +08:00
committed by Ilya Dryomov
parent 83701246ae
commit 28127bdd2f
3 changed files with 161 additions and 3 deletions
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14
fs/ceph/file.c
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@@ -963,6 +963,12 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (err)
goto out;
if (ci->i_inline_version != CEPH_INLINE_NONE) {
err = ceph_uninline_data(file, NULL);
if (err < 0)
goto out;
}
retry_snap:
if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL)) {
err = -ENOSPC;
@@ -1024,6 +1030,7 @@ retry_snap:
if (written >= 0) {
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);
spin_unlock(&ci->i_ceph_lock);
if (dirty)
@@ -1269,6 +1276,12 @@ static long ceph_fallocate(struct file *file, int mode,
goto unlock;
}
if (ci->i_inline_version != CEPH_INLINE_NONE) {
ret = ceph_uninline_data(file, NULL);
if (ret < 0)
goto unlock;
}
size = i_size_read(inode);
if (!(mode & FALLOC_FL_KEEP_SIZE))
endoff = offset + length;
@@ -1295,6 +1308,7 @@ 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);
spin_unlock(&ci->i_ceph_lock);
if (dirty)