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authorJeff Mahoney <jeffm@suse.com>2008-02-15 14:37:22 -0800
committerAl Viro <viro@zeniv.linux.org.uk>2008-03-19 06:49:36 -0400
commit3227e14c3cab5ef7972c72eb13c13de444b5bfbc (patch)
treee846d8e513f1d43da3e5ca9a7004fb8349b67852 /fs
parentf382d6e631fe424200ee0d8bb16539f5b7bef7be (diff)
downloadvexpress-lsk-3227e14c3cab5ef7972c72eb13c13de444b5bfbc.tar.gz
[PATCH] reiserfs: eliminate private use of struct file in xattr
After several posts and bug reports regarding interaction with the NULL nameidata, here's a patch to clean up the mess with struct file in the reiserfs xattr code. As observed in several of the posts, there's really no need for struct file to exist in the xattr code. It was really only passed around due to the f_op->readdir() and a_ops->{prepare,commit}_write prototypes requiring it. reiserfs_prepare_write() and reiserfs_commit_write() don't actually use the struct file passed to it, and the xattr code uses a private version of reiserfs_readdir() to enumerate the xattr directories. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/reiserfs/xattr.c110
1 files changed, 30 insertions, 80 deletions
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index eba037b3338..344b9b96cc5 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -191,28 +191,11 @@ static struct dentry *get_xa_file_dentry(const struct inode *inode,
dput(xadir);
if (err)
xafile = ERR_PTR(err);
- return xafile;
-}
-
-/* Opens a file pointer to the attribute associated with inode */
-static struct file *open_xa_file(const struct inode *inode, const char *name,
- int flags)
-{
- struct dentry *xafile;
- struct file *fp;
-
- xafile = get_xa_file_dentry(inode, name, flags);
- if (IS_ERR(xafile))
- return ERR_PTR(PTR_ERR(xafile));
else if (!xafile->d_inode) {
dput(xafile);
- return ERR_PTR(-ENODATA);
+ xafile = ERR_PTR(-ENODATA);
}
-
- fp = dentry_open(xafile, NULL, O_RDWR);
- /* dentry_open dputs the dentry if it fails */
-
- return fp;
+ return xafile;
}
/*
@@ -228,9 +211,8 @@ static struct file *open_xa_file(const struct inode *inode, const char *name,
* we're called with i_mutex held, so there are no worries about the directory
* changing underneath us.
*/
-static int __xattr_readdir(struct file *filp, void *dirent, filldir_t filldir)
+static int __xattr_readdir(struct inode *inode, void *dirent, filldir_t filldir)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
struct cpu_key pos_key; /* key of current position in the directory (key of directory entry) */
INITIALIZE_PATH(path_to_entry);
struct buffer_head *bh;
@@ -374,23 +356,16 @@ static int __xattr_readdir(struct file *filp, void *dirent, filldir_t filldir)
*
*/
static
-int xattr_readdir(struct file *file, filldir_t filler, void *buf)
+int xattr_readdir(struct inode *inode, filldir_t filler, void *buf)
{
- struct inode *inode = file->f_path.dentry->d_inode;
- int res = -ENOTDIR;
- if (!file->f_op || !file->f_op->readdir)
- goto out;
+ int res = -ENOENT;
mutex_lock_nested(&inode->i_mutex, I_MUTEX_XATTR);
-// down(&inode->i_zombie);
- res = -ENOENT;
if (!IS_DEADDIR(inode)) {
lock_kernel();
- res = __xattr_readdir(file, buf, filler);
+ res = __xattr_readdir(inode, buf, filler);
unlock_kernel();
}
-// up(&inode->i_zombie);
mutex_unlock(&inode->i_mutex);
- out:
return res;
}
@@ -442,7 +417,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
size_t buffer_size, int flags)
{
int err = 0;
- struct file *fp;
+ struct dentry *dentry;
struct page *page;
char *data;
struct address_space *mapping;
@@ -460,18 +435,18 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
xahash = xattr_hash(buffer, buffer_size);
open_file:
- fp = open_xa_file(inode, name, flags);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
+ dentry = get_xa_file_dentry(inode, name, flags);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
goto out;
}
- xinode = fp->f_path.dentry->d_inode;
+ xinode = dentry->d_inode;
REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
/* we need to copy it off.. */
if (xinode->i_nlink > 1) {
- fput(fp);
+ dput(dentry);
err = reiserfs_xattr_del(inode, name);
if (err < 0)
goto out;
@@ -485,7 +460,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
newattrs.ia_size = buffer_size;
newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
mutex_lock_nested(&xinode->i_mutex, I_MUTEX_XATTR);
- err = notify_change(fp->f_path.dentry, &newattrs);
+ err = notify_change(dentry, &newattrs);
if (err)
goto out_filp;
@@ -518,15 +493,14 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
rxh->h_hash = cpu_to_le32(xahash);
}
- err = reiserfs_prepare_write(fp, page, page_offset,
+ err = reiserfs_prepare_write(NULL, page, page_offset,
page_offset + chunk + skip);
if (!err) {
if (buffer)
memcpy(data + skip, buffer + buffer_pos, chunk);
- err =
- reiserfs_commit_write(fp, page, page_offset,
- page_offset + chunk +
- skip);
+ err = reiserfs_commit_write(NULL, page, page_offset,
+ page_offset + chunk +
+ skip);
}
unlock_page(page);
reiserfs_put_page(page);
@@ -548,7 +522,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
out_filp:
mutex_unlock(&xinode->i_mutex);
- fput(fp);
+ dput(dentry);
out:
return err;
@@ -562,7 +536,7 @@ reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
size_t buffer_size)
{
ssize_t err = 0;
- struct file *fp;
+ struct dentry *dentry;
size_t isize;
size_t file_pos = 0;
size_t buffer_pos = 0;
@@ -578,13 +552,13 @@ reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
if (get_inode_sd_version(inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
- fp = open_xa_file(inode, name, FL_READONLY);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
+ dentry = get_xa_file_dentry(inode, name, FL_READONLY);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
goto out;
}
- xinode = fp->f_path.dentry->d_inode;
+ xinode = dentry->d_inode;
isize = xinode->i_size;
REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
@@ -652,7 +626,7 @@ reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
}
out_dput:
- fput(fp);
+ dput(dentry);
out:
return err;
@@ -742,7 +716,6 @@ reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen,
/* This is called w/ inode->i_mutex downed */
int reiserfs_delete_xattrs(struct inode *inode)
{
- struct file *fp;
struct dentry *dir, *root;
int err = 0;
@@ -763,15 +736,8 @@ int reiserfs_delete_xattrs(struct inode *inode)
return 0;
}
- fp = dentry_open(dir, NULL, O_RDWR);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
- /* dentry_open dputs the dentry if it fails */
- goto out;
- }
-
lock_kernel();
- err = xattr_readdir(fp, reiserfs_delete_xattrs_filler, dir);
+ err = xattr_readdir(dir->d_inode, reiserfs_delete_xattrs_filler, dir);
if (err) {
unlock_kernel();
goto out_dir;
@@ -791,7 +757,7 @@ int reiserfs_delete_xattrs(struct inode *inode)
unlock_kernel();
out_dir:
- fput(fp);
+ dput(dir);
out:
if (!err)
@@ -833,7 +799,6 @@ reiserfs_chown_xattrs_filler(void *buf, const char *name, int namelen,
int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
{
- struct file *fp;
struct dentry *dir;
int err = 0;
struct reiserfs_chown_buf buf;
@@ -857,13 +822,6 @@ int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
goto out;
}
- fp = dentry_open(dir, NULL, O_RDWR);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
- /* dentry_open dputs the dentry if it fails */
- goto out;
- }
-
lock_kernel();
attrs->ia_valid &= (ATTR_UID | ATTR_GID | ATTR_CTIME);
@@ -871,7 +829,7 @@ int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
buf.attrs = attrs;
buf.inode = inode;
- err = xattr_readdir(fp, reiserfs_chown_xattrs_filler, &buf);
+ err = xattr_readdir(dir->d_inode, reiserfs_chown_xattrs_filler, &buf);
if (err) {
unlock_kernel();
goto out_dir;
@@ -881,7 +839,7 @@ int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
unlock_kernel();
out_dir:
- fput(fp);
+ dput(dir);
out:
attrs->ia_valid = ia_valid;
@@ -1029,7 +987,6 @@ reiserfs_listxattr_filler(void *buf, const char *name, int namelen,
*/
ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
{
- struct file *fp;
struct dentry *dir;
int err = 0;
struct reiserfs_listxattr_buf buf;
@@ -1052,13 +1009,6 @@ ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
goto out;
}
- fp = dentry_open(dir, NULL, O_RDWR);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
- /* dentry_open dputs the dentry if it fails */
- goto out;
- }
-
buf.r_buf = buffer;
buf.r_size = buffer ? size : 0;
buf.r_pos = 0;
@@ -1066,7 +1016,7 @@ ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
REISERFS_I(dentry->d_inode)->i_flags |= i_has_xattr_dir;
- err = xattr_readdir(fp, reiserfs_listxattr_filler, &buf);
+ err = xattr_readdir(dir->d_inode, reiserfs_listxattr_filler, &buf);
if (err)
goto out_dir;
@@ -1076,7 +1026,7 @@ ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
err = buf.r_pos;
out_dir:
- fput(fp);
+ dput(dir);
out:
reiserfs_read_unlock_xattr_i(dentry->d_inode);