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Date: Wed, 7 Mar 2012 22:22:33 +0100
From: Miklos Szeredi <miklos@...redi.hu>
To: viro@...IV.linux.org.uk
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
hch@...radead.org, Trond.Myklebust@...app.com, sfrench@...ba.org,
sage@...dream.net, ericvh@...il.com, mszeredi@...e.cz
Subject: [PATCH 16/25] 9p: implement i_op->atomic_create()
From: Miklos Szeredi <mszeredi@...e.cz>
Replace 9p's ->create implementations with ->atomic_create implementations. No
functionality is changed.
Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
---
fs/9p/vfs_inode.c | 28 ++++++++++++----------------
fs/9p/vfs_inode_dotl.c | 36 ++++++++++++++++++------------------
2 files changed, 30 insertions(+), 34 deletions(-)
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 014c8dd..3d526a7 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -716,18 +716,16 @@ error:
* @dir: directory inode that is being created
* @dentry: dentry that is being deleted
* @mode: create permissions
- * @nd: path information
*
*/
-static int
-v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- struct nameidata *nd)
+static struct file *
+v9fs_vfs_create(struct inode *dir, struct dentry *dentry, struct opendata *od,
+ unsigned flags, umode_t mode)
{
int err;
u32 perm;
- int flags;
- struct file *filp;
+ struct file *filp = NULL;
struct v9fs_inode *v9inode;
struct v9fs_session_info *v9ses;
struct p9_fid *fid, *inode_fid;
@@ -736,10 +734,8 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
fid = NULL;
v9ses = v9fs_inode2v9ses(dir);
perm = unixmode2p9mode(v9ses, mode);
- if (nd)
- flags = nd->intent.open.flags;
- else
- flags = O_RDWR;
+ if (!od)
+ flags = O_RDWR; /* Why not O_RDONLY|O_CREAT|O_EXCL? */
fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
v9fs_uflags2omode(flags,
@@ -752,7 +748,7 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
v9fs_invalidate_inode_attr(dir);
/* if we are opening a file, assign the open fid to the file */
- if (nd) {
+ if (od) {
v9inode = V9FS_I(dentry->d_inode);
mutex_lock(&v9inode->v_mutex);
if (v9ses->cache && !v9inode->writeback_fid &&
@@ -773,7 +769,7 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
v9inode->writeback_fid = (void *) inode_fid;
}
mutex_unlock(&v9inode->v_mutex);
- filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
+ filp = finish_open(od, dentry, generic_file_open);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
goto error;
@@ -787,13 +783,13 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
} else
p9_client_clunk(fid);
- return 0;
+ return filp;
error:
if (fid)
p9_client_clunk(fid);
- return err;
+ return ERR_PTR(err);
}
/**
@@ -1486,7 +1482,7 @@ out:
}
static const struct inode_operations v9fs_dir_inode_operations_dotu = {
- .create = v9fs_vfs_create,
+ .atomic_create = v9fs_vfs_create,
.lookup = v9fs_vfs_lookup,
.symlink = v9fs_vfs_symlink,
.link = v9fs_vfs_link,
@@ -1500,7 +1496,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = {
};
static const struct inode_operations v9fs_dir_inode_operations = {
- .create = v9fs_vfs_create,
+ .atomic_create = v9fs_vfs_create,
.lookup = v9fs_vfs_lookup,
.unlink = v9fs_vfs_unlink,
.mkdir = v9fs_vfs_mkdir,
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index a1e6c99..6e37911 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -248,17 +248,15 @@ int v9fs_open_to_dotl_flags(int flags)
* @dir: directory inode that is being created
* @dentry: dentry that is being deleted
* @mode: create permissions
- * @nd: path information
*
*/
-static int
-v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
- struct nameidata *nd)
+static struct file *
+v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry,
+ struct opendata *od, unsigned flags, umode_t omode)
{
int err = 0;
gid_t gid;
- int flags;
umode_t mode;
char *name = NULL;
struct file *filp;
@@ -271,15 +269,16 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
struct posix_acl *pacl = NULL, *dacl = NULL;
v9ses = v9fs_inode2v9ses(dir);
- if (nd)
- flags = nd->intent.open.flags;
- else {
+ if (!od) {
/*
- * create call without LOOKUP_OPEN is due
- * to mknod of regular files. So use mknod
- * operation.
+ * create call without filp is due to mknod of regular files.
+ * So use mknod operation.
*/
- return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
+ err = v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
+ if (err)
+ goto err_return;
+
+ return NULL;
}
name = (char *) dentry->d_name.name;
@@ -290,7 +289,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
- return err;
+ goto err_return;
}
/* clone a fid to use for creation */
@@ -298,7 +297,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
- return err;
+ goto err_return;
}
gid = v9fs_get_fsgid_for_create(dir);
@@ -363,7 +362,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
}
mutex_unlock(&v9inode->v_mutex);
/* Since we are opening a file, assign the open fid to the file */
- filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
+ filp = finish_open(od, dentry, generic_file_open);
if (IS_ERR(filp)) {
err = PTR_ERR(filp);
goto err_clunk_old_fid;
@@ -373,7 +372,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
if (v9ses->cache)
v9fs_cache_inode_set_cookie(inode, filp);
#endif
- return 0;
+ return filp;
error:
if (fid)
@@ -382,7 +381,8 @@ err_clunk_old_fid:
if (ofid)
p9_client_clunk(ofid);
v9fs_set_create_acl(NULL, &dacl, &pacl);
- return err;
+err_return:
+ return ERR_PTR(err);
}
/**
@@ -999,7 +999,7 @@ out:
}
const struct inode_operations v9fs_dir_inode_operations_dotl = {
- .create = v9fs_vfs_create_dotl,
+ .atomic_create = v9fs_vfs_create_dotl,
.lookup = v9fs_vfs_lookup,
.link = v9fs_vfs_link_dotl,
.symlink = v9fs_vfs_symlink_dotl,
--
1.7.7
--
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