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xfs: convert xfs_open_by_handle() to FD_PREPARE() 

Link: https://patch.msgid.link/20251123-work-fd-prepare-v4-17-b6efa1706cfd@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-11-23 17:33:35 +01:00
parent 39f6e7581a
commit 993f30468e
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 17 additions and 39 deletions
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56
fs/xfs/xfs_handle.c
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@ -233,14 +233,11 @@ xfs_open_by_handle(
xfs_fsop_handlereq_t *hreq)
{
const struct cred *cred = current_cred();
int error;
int fd;
int permflag;
struct file *filp;
struct inode *inode;
struct dentry *dentry;
fmode_t fmode;
struct path path;
struct path path __free(path_put) = {};
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@ -249,12 +246,11 @@ xfs_open_by_handle(
if (IS_ERR(dentry))
return PTR_ERR(dentry);
inode = d_inode(dentry);
path.dentry = dentry;
/* Restrict xfs_open_by_handle to directories & regular files. */
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
error = -EPERM;
goto out_dput;
}
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
return -EPERM;
#if BITS_PER_LONG != 32
hreq->oflags |= O_LARGEFILE;
@ -263,48 +259,30 @@ xfs_open_by_handle(
permflag = hreq->oflags;
fmode = OPEN_FMODE(permflag);
if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
(fmode & FMODE_WRITE) && IS_APPEND(inode)) {
error = -EPERM;
goto out_dput;
}
(fmode & FMODE_WRITE) && IS_APPEND(inode))
return -EPERM;
if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
error = -EPERM;
goto out_dput;
}
if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode))
return -EPERM;
/* Can't write directories. */
if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
error = -EISDIR;
goto out_dput;
}
if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE))
return -EISDIR;
fd = get_unused_fd_flags(0);
if (fd < 0) {
error = fd;
goto out_dput;
}
path.mnt = mntget(parfilp->f_path.mnt);
path.mnt = parfilp->f_path.mnt;
path.dentry = dentry;
filp = dentry_open(&path, hreq->oflags, cred);
dput(dentry);
if (IS_ERR(filp)) {
put_unused_fd(fd);
return PTR_ERR(filp);
}
FD_PREPARE(fdf, 0, dentry_open(&path, hreq->oflags, cred));
if (fdf.err)
return fdf.err;
if (S_ISREG(inode->i_mode)) {
struct file *filp = fd_prepare_file(fdf);
filp->f_flags |= O_NOATIME;
filp->f_mode |= FMODE_NOCMTIME;
}
fd_install(fd, filp);
return fd;
out_dput:
dput(dentry);
return error;
return fd_publish(fdf);
}
int