[RFC PATCH v11 36/51] ceph: add __ceph_get_caps helper support

Jeff Layton
2022-03-22T14:16:34Z

From: Xiubo Li <xiubli@redhat.com>

Break out the guts of ceph_get_caps into a helper that takes an inode
and ceph_file_info instead of a file pointer.

Signed-off-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/ceph/caps.c | 19 +++++++++++++------
fs/ceph/super.h | 2 ++
2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index fbf120a6aa96..2aa338219d27 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -2946,10 +2946,9 @@ int ceph_try_get_caps(struct inode *inode, int need, int want,
* due to a small max_size, make sure we check_max_size (and possibly
* ask the mds) so we don't get hung up indefinitely.
*/
-int ceph_get_caps(struct file *filp, int need, int want, loff_t endoff, int *got)
+int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi, int need,
+ int want, loff_t endoff, int *got)
{
- struct ceph_file_info *fi = filp->private_data;
- struct inode *inode = file_inode(filp);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
int ret, _got, flags;
@@ -2958,7 +2957,7 @@ int ceph_get_caps(struct file *filp, int need, int want, loff_t endoff, int *got
if (ret < 0)
return ret;

- if ((fi->fmode & CEPH_FILE_MODE_WR) &&
+ if (fi && (fi->fmode & CEPH_FILE_MODE_WR) &&
fi->filp_gen != READ_ONCE(fsc->filp_gen))
return -EBADF;

@@ -2966,7 +2965,7 @@ int ceph_get_caps(struct file *filp, int need, int want, loff_t endoff, int *got

while (true) {
flags &= CEPH_FILE_MODE_MASK;
- if (atomic_read(&fi->num_locks))
+ if (fi && atomic_read(&fi->num_locks))
flags |= CHECK_FILELOCK;
_got = 0;
ret = try_get_cap_refs(inode, need, want, endoff,
@@ -3011,7 +3010,7 @@ int ceph_get_caps(struct file *filp, int need, int want, loff_t endoff, int *got
continue;
}

- if ((fi->fmode & CEPH_FILE_MODE_WR) &&
+ if (fi && (fi->fmode & CEPH_FILE_MODE_WR) &&
fi->filp_gen != READ_ONCE(fsc->filp_gen)) {
if (ret >= 0 && _got)
ceph_put_cap_refs(ci, _got);
@@ -3074,6 +3073,14 @@ int ceph_get_caps(struct file *filp, int need, int want, loff_t endoff, int *got
return 0;
}

+int ceph_get_caps(struct file *filp, int need, int want, loff_t endoff, int *got)
+{
+ struct ceph_file_info *fi = filp->private_data;
+ struct inode *inode = file_inode(filp);
+
+ return __ceph_get_caps(inode, fi, need, want, endoff, got);
+}
+
/*
* Take cap refs. Caller must already know we hold at least one ref
* on the caps in question or we don't know this is safe.
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 8f5fdb59344c..fef4cda44861 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -1238,6 +1238,8 @@ extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
struct inode *dir,
int mds, int drop, int unless);

+extern int __ceph_get_caps(struct inode *inode, struct ceph_file_info *fi,
+ int need, int want, loff_t endoff, int *got);
extern int ceph_get_caps(struct file *filp, int need, int want,
loff_t endoff, int *got);
extern int ceph_try_get_caps(struct inode *inode,
--
2.35.1