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author | Yan, Zheng <zheng.z.yan@intel.com> | 2013-03-01 02:57:54 (GMT) |
---|---|---|
committer | Sage Weil <sage@inktank.com> | 2013-05-02 04:16:11 (GMT) |
commit | 3f99969f42300e52779ae0656678c2534097f2ea (patch) | |
tree | b3b07bc105f3c966c8a50e0d2e3bac5e5f3b4eeb /fs/ceph | |
parent | 6070e0c1e2b515ad5edc2f8224031b051bd08109 (diff) | |
download | linux-fsl-qoriq-3f99969f42300e52779ae0656678c2534097f2ea.tar.xz |
ceph: acquire i_mutex in __ceph_do_pending_vmtruncate
make __ceph_do_pending_vmtruncate() acquire the i_mutex if the caller
does not hold the i_mutex, so ceph_aio_read() can call safely.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Greg Farnum <greg@inktank.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r-- | fs/ceph/file.c | 6 | ||||
-rw-r--r-- | fs/ceph/inode.c | 18 | ||||
-rw-r--r-- | fs/ceph/super.h | 2 |
3 files changed, 13 insertions, 13 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 3d1aefe..dd47026 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -653,7 +653,7 @@ static ssize_t ceph_aio_read(struct kiocb *iocb, const struct iovec *iov, dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n", inode, ceph_vinop(inode), pos, (unsigned)len, inode); again: - __ceph_do_pending_vmtruncate(inode); + __ceph_do_pending_vmtruncate(inode, true); if (fi->fmode & CEPH_FILE_MODE_LAZY) want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; else @@ -730,7 +730,7 @@ retry_snap: ret = -ENOSPC; goto out; } - __ceph_do_pending_vmtruncate(inode); + __ceph_do_pending_vmtruncate(inode, true); 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); @@ -801,7 +801,7 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) int ret; mutex_lock(&inode->i_mutex); - __ceph_do_pending_vmtruncate(inode); + __ceph_do_pending_vmtruncate(inode, false); if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE); diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index be2f262..eeac43d 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1453,7 +1453,7 @@ out: /* - * called by trunc_wq; take i_mutex ourselves + * called by trunc_wq; * * We also truncate in a separate thread as well. */ @@ -1464,9 +1464,7 @@ static void ceph_vmtruncate_work(struct work_struct *work) struct inode *inode = &ci->vfs_inode; dout("vmtruncate_work %p\n", inode); - mutex_lock(&inode->i_mutex); - __ceph_do_pending_vmtruncate(inode); - mutex_unlock(&inode->i_mutex); + __ceph_do_pending_vmtruncate(inode, true); iput(inode); } @@ -1490,12 +1488,10 @@ void ceph_queue_vmtruncate(struct inode *inode) } /* - * called with i_mutex held. - * * Make sure any pending truncation is applied before doing anything * that may depend on it. */ -void __ceph_do_pending_vmtruncate(struct inode *inode) +void __ceph_do_pending_vmtruncate(struct inode *inode, bool needlock) { struct ceph_inode_info *ci = ceph_inode(inode); u64 to; @@ -1528,7 +1524,11 @@ retry: ci->i_truncate_pending, to); spin_unlock(&ci->i_ceph_lock); + if (needlock) + mutex_lock(&inode->i_mutex); truncate_inode_pages(inode->i_mapping, to); + if (needlock) + mutex_unlock(&inode->i_mutex); spin_lock(&ci->i_ceph_lock); if (to == ci->i_truncate_size) { @@ -1581,7 +1581,7 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr) if (ceph_snap(inode) != CEPH_NOSNAP) return -EROFS; - __ceph_do_pending_vmtruncate(inode); + __ceph_do_pending_vmtruncate(inode, false); err = inode_change_ok(inode, attr); if (err != 0) @@ -1763,7 +1763,7 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr) ceph_cap_string(dirtied), mask); ceph_mdsc_put_request(req); - __ceph_do_pending_vmtruncate(inode); + __ceph_do_pending_vmtruncate(inode, false); return err; out: spin_unlock(&ci->i_ceph_lock); diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 20dd1ee..a04eda7 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -694,7 +694,7 @@ extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, extern int ceph_inode_holds_cap(struct inode *inode, int mask); extern int ceph_inode_set_size(struct inode *inode, loff_t size); -extern void __ceph_do_pending_vmtruncate(struct inode *inode); +extern void __ceph_do_pending_vmtruncate(struct inode *inode, bool needlock); extern void ceph_queue_vmtruncate(struct inode *inode); extern void ceph_queue_invalidate(struct inode *inode); |