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authorMiklos Szeredi <mszeredi@suse.cz>2012-06-05 15:10:27 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2012-07-14 16:33:18 +0400
commit015c3bbcd88df2305aae5b017a9c91c08b380aa1 (patch)
tree25f5e936ad16eddda39477a64addb4b54970bbd2 /fs/namei.c
parente43ae79c540270865918dab5ac914c74f43101e2 (diff)
downloadop-kernel-dev-015c3bbcd88df2305aae5b017a9c91c08b380aa1.zip
op-kernel-dev-015c3bbcd88df2305aae5b017a9c91c08b380aa1.tar.gz
vfs: remove open intents from nameidata
All users of open intents have been converted to use ->atomic_{open,create}. This patch gets rid of nd->intent.open and related infrastructure. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c95
1 files changed, 45 insertions, 50 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 9e11ae8..0ed87625 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -463,22 +463,6 @@ err_root:
return -ECHILD;
}
-/**
- * release_open_intent - free up open intent resources
- * @nd: pointer to nameidata
- */
-void release_open_intent(struct nameidata *nd)
-{
- struct file *file = nd->intent.open.file;
-
- if (file && !IS_ERR(file)) {
- if (file->f_path.dentry == NULL)
- put_filp(file);
- else
- fput(file);
- }
-}
-
static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
return dentry->d_op->d_revalidate(dentry, nd);
@@ -2210,7 +2194,8 @@ static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
}
static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
- struct path *path, const struct open_flags *op,
+ struct path *path, struct opendata *od,
+ const struct open_flags *op,
int *want_write, bool need_lookup,
bool *created)
{
@@ -2219,7 +2204,6 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
umode_t mode;
int error;
int acc_mode;
- struct opendata od;
struct file *filp;
int create_error = 0;
struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
@@ -2285,14 +2269,13 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
if (nd->flags & LOOKUP_DIRECTORY)
open_flag |= O_DIRECTORY;
- od.dentry = DENTRY_NOT_SET;
- od.mnt = nd->path.mnt;
- od.filp = &nd->intent.open.file;
- filp = dir->i_op->atomic_open(dir, dentry, &od, open_flag, mode,
+ od->dentry = DENTRY_NOT_SET;
+ od->mnt = nd->path.mnt;
+ filp = dir->i_op->atomic_open(dir, dentry, od, open_flag, mode,
created);
if (IS_ERR(filp)) {
- if (WARN_ON(od.dentry != DENTRY_NOT_SET))
- dput(od.dentry);
+ if (WARN_ON(od->dentry != DENTRY_NOT_SET))
+ dput(od->dentry);
if (create_error && PTR_ERR(filp) == -ENOENT)
filp = ERR_PTR(create_error);
@@ -2306,13 +2289,13 @@ static struct file *atomic_open(struct nameidata *nd, struct dentry *dentry,
}
if (!filp) {
- if (WARN_ON(od.dentry == DENTRY_NOT_SET)) {
+ if (WARN_ON(od->dentry == DENTRY_NOT_SET)) {
filp = ERR_PTR(-EIO);
goto out;
}
- if (od.dentry) {
+ if (od->dentry) {
dput(dentry);
- dentry = od.dentry;
+ dentry = od->dentry;
}
goto looked_up;
}
@@ -2375,6 +2358,7 @@ looked_up:
* was performed, only lookup.
*/
static struct file *lookup_open(struct nameidata *nd, struct path *path,
+ struct opendata *od,
const struct open_flags *op,
int *want_write, bool *created)
{
@@ -2394,7 +2378,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
goto out_no_open;
if ((nd->flags & LOOKUP_OPEN) && dir_inode->i_op->atomic_open) {
- return atomic_open(nd, dentry, path, op, want_write,
+ return atomic_open(nd, dentry, path, od, op, want_write,
need_lookup, created);
}
@@ -2416,7 +2400,7 @@ static struct file *lookup_open(struct nameidata *nd, struct path *path,
* rw->ro transition does not occur between
* the time when the file is created and when
* a permanent write count is taken through
- * the 'struct file' in nameidata_to_filp().
+ * the 'struct file' in finish_open().
*/
error = mnt_want_write(nd->path.mnt);
if (error)
@@ -2444,7 +2428,8 @@ out_dput:
* Handle the last step of open()
*/
static struct file *do_last(struct nameidata *nd, struct path *path,
- const struct open_flags *op, const char *pathname)
+ struct opendata *od, const struct open_flags *op,
+ const char *pathname)
{
struct dentry *dir = nd->path.dentry;
int open_flag = op->open_flag;
@@ -2521,7 +2506,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
retry_lookup:
mutex_lock(&dir->d_inode->i_mutex);
- filp = lookup_open(nd, path, op, &want_write, &created);
+ filp = lookup_open(nd, path, od, op, &want_write, &created);
mutex_unlock(&dir->d_inode->i_mutex);
if (filp) {
@@ -2627,7 +2612,8 @@ common:
error = may_open(&nd->path, acc_mode, open_flag);
if (error)
goto exit;
- filp = nameidata_to_filp(nd);
+ od->mnt = nd->path.mnt;
+ filp = finish_open(od, nd->path.dentry, NULL);
if (filp == ERR_PTR(-EOPENSTALE) && save_parent.dentry && !retried) {
BUG_ON(save_parent.dentry != dir);
path_put(&nd->path);
@@ -2642,6 +2628,11 @@ common:
retried = true;
goto retry_lookup;
}
+ if (IS_ERR(filp))
+ goto out;
+ error = open_check_o_direct(filp);
+ if (error)
+ goto exit_fput;
opened:
if (!IS_ERR(filp)) {
error = ima_file_check(filp, op->acc_mode);
@@ -2671,24 +2662,26 @@ exit_dput:
exit:
filp = ERR_PTR(error);
goto out;
+exit_fput:
+ fput(filp);
+ goto exit;
+
}
static struct file *path_openat(int dfd, const char *pathname,
struct nameidata *nd, const struct open_flags *op, int flags)
{
struct file *base = NULL;
- struct file *filp;
+ struct opendata od;
+ struct file *res;
struct path path;
int error;
- filp = get_empty_filp();
- if (!filp)
+ od.filp = get_empty_filp();
+ if (!od.filp)
return ERR_PTR(-ENFILE);
- filp->f_flags = op->open_flag;
- nd->intent.open.file = filp;
- nd->intent.open.flags = open_to_namei_flags(op->open_flag);
- nd->intent.open.create_mode = op->mode;
+ od.filp->f_flags = op->open_flag;
error = path_init(dfd, pathname, flags | LOOKUP_PARENT, nd, &base);
if (unlikely(error))
@@ -2699,14 +2692,14 @@ static struct file *path_openat(int dfd, const char *pathname,
if (unlikely(error))
goto out_filp;
- filp = do_last(nd, &path, op, pathname);
- while (unlikely(!filp)) { /* trailing symlink */
+ res = do_last(nd, &path, &od, op, pathname);
+ while (unlikely(!res)) { /* trailing symlink */
struct path link = path;
void *cookie;
if (!(nd->flags & LOOKUP_FOLLOW)) {
path_put_conditional(&path, nd);
path_put(&nd->path);
- filp = ERR_PTR(-ELOOP);
+ res = ERR_PTR(-ELOOP);
break;
}
nd->flags |= LOOKUP_PARENT;
@@ -2714,7 +2707,7 @@ static struct file *path_openat(int dfd, const char *pathname,
error = follow_link(&link, nd, &cookie);
if (unlikely(error))
goto out_filp;
- filp = do_last(nd, &path, op, pathname);
+ res = do_last(nd, &path, &od, op, pathname);
put_link(nd, &link, cookie);
}
out:
@@ -2722,17 +2715,20 @@ out:
path_put(&nd->root);
if (base)
fput(base);
- release_open_intent(nd);
- if (filp == ERR_PTR(-EOPENSTALE)) {
+ if (od.filp) {
+ BUG_ON(od.filp->f_path.dentry);
+ put_filp(od.filp);
+ }
+ if (res == ERR_PTR(-EOPENSTALE)) {
if (flags & LOOKUP_RCU)
- filp = ERR_PTR(-ECHILD);
+ res = ERR_PTR(-ECHILD);
else
- filp = ERR_PTR(-ESTALE);
+ res = ERR_PTR(-ESTALE);
}
- return filp;
+ return res;
out_filp:
- filp = ERR_PTR(error);
+ res = ERR_PTR(error);
goto out;
}
@@ -2788,7 +2784,6 @@ struct dentry *kern_path_create(int dfd, const char *pathname, struct path *path
goto out;
nd.flags &= ~LOOKUP_PARENT;
nd.flags |= LOOKUP_CREATE | LOOKUP_EXCL;
- nd.intent.open.flags = O_EXCL;
/*
* Do the final lookup.
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