*/
static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
- struct file *file, unsigned flags,
- umode_t mode, int *opened)
+ struct file *file, unsigned flags,
+ umode_t mode, int *opened)
{
struct dentry *d;
bool excl = !!(flags & O_EXCL);
return error;
}
+/**
+ * update_moved_ino - Update an inode that's being moved
+ * @ip: The inode being moved
+ * @ndip: The parent directory of the new filename
+ * @dir_rename: True of ip is a directory
+ *
+ * Returns: errno
+ */
+
+static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
+ int dir_rename)
+{
+ int error;
+ struct buffer_head *dibh;
+
+ if (dir_rename)
+ return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (error)
+ return error;
+ ip->i_inode.i_ctime = CURRENT_TIME;
+ gfs2_trans_add_meta(ip->i_gl, dibh);
+ gfs2_dinode_out(ip, dibh->b_data);
+ brelse(dibh);
+ return 0;
+}
+
+
/**
* gfs2_rename - Rename a file
* @odir: Parent directory of old file name
if (S_ISDIR(ip->i_inode.i_mode)) {
dir_rename = 1;
- /* don't move a dirctory into it's subdir */
+ /* don't move a directory into its subdir */
error = gfs2_ok_to_move(ip, ndip);
if (error)
goto out_gunlock_r;
if (nip)
error = gfs2_unlink_inode(ndip, ndentry);
- if (dir_rename) {
- error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
- if (error)
- goto out_end_trans;
- } else {
- struct buffer_head *dibh;
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto out_end_trans;
- ip->i_inode.i_ctime = CURRENT_TIME;
- gfs2_trans_add_meta(ip->i_gl, dibh);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
- }
+ error = update_moved_ino(ip, ndip, dir_rename);
+ if (error)
+ goto out_end_trans;
error = gfs2_dir_del(odip, odentry);
if (error)
return error;
}
+/**
+ * gfs2_exchange - exchange two files
+ * @odir: Parent directory of old file name
+ * @odentry: The old dentry of the file
+ * @ndir: Parent directory of new file name
+ * @ndentry: The new dentry of the file
+ * @flags: The rename flags
+ *
+ * Returns: errno
+ */
+
+static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
+ struct inode *ndir, struct dentry *ndentry,
+ unsigned int flags)
+{
+ struct gfs2_inode *odip = GFS2_I(odir);
+ struct gfs2_inode *ndip = GFS2_I(ndir);
+ struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
+ struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
+ struct gfs2_sbd *sdp = GFS2_SB(odir);
+ struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, };
+ unsigned int num_gh;
+ unsigned int x;
+ umode_t old_mode = oip->i_inode.i_mode;
+ umode_t new_mode = nip->i_inode.i_mode;
+ int error;
+
+ error = gfs2_rindex_update(sdp);
+ if (error)
+ return error;
+
+ if (odip != ndip) {
+ error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
+ 0, &r_gh);
+ if (error)
+ goto out;
+
+ if (S_ISDIR(old_mode)) {
+ /* don't move a directory into its subdir */
+ error = gfs2_ok_to_move(oip, ndip);
+ if (error)
+ goto out_gunlock_r;
+ }
+
+ if (S_ISDIR(new_mode)) {
+ /* don't move a directory into its subdir */
+ error = gfs2_ok_to_move(nip, odip);
+ if (error)
+ goto out_gunlock_r;
+ }
+ }
+
+ num_gh = 1;
+ gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
+ if (odip != ndip) {
+ gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
+ num_gh++;
+ }
+ gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
+ num_gh++;
+
+ gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
+ num_gh++;
+
+ for (x = 0; x < num_gh; x++) {
+ error = gfs2_glock_nq(ghs + x);
+ if (error)
+ goto out_gunlock;
+ }
+
+ error = -ENOENT;
+ if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
+ goto out_gunlock;
+
+ error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
+ if (error)
+ goto out_gunlock;
+ error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
+ if (error)
+ goto out_gunlock;
+
+ if (S_ISDIR(old_mode)) {
+ error = gfs2_permission(odentry->d_inode, MAY_WRITE);
+ if (error)
+ goto out_gunlock;
+ }
+ if (S_ISDIR(new_mode)) {
+ error = gfs2_permission(ndentry->d_inode, MAY_WRITE);
+ if (error)
+ goto out_gunlock;
+ }
+ error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
+ if (error)
+ goto out_gunlock;
+
+ error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
+ if (error)
+ goto out_end_trans;
+
+ error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
+ if (error)
+ goto out_end_trans;
+
+ error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
+ IF2DT(old_mode));
+ if (error)
+ goto out_end_trans;
+
+ error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
+ IF2DT(new_mode));
+ if (error)
+ goto out_end_trans;
+
+ if (odip != ndip) {
+ if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
+ inc_nlink(&odip->i_inode);
+ drop_nlink(&ndip->i_inode);
+ } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
+ inc_nlink(&ndip->i_inode);
+ drop_nlink(&odip->i_inode);
+ }
+ }
+ mark_inode_dirty(&ndip->i_inode);
+ if (odip != ndip)
+ mark_inode_dirty(&odip->i_inode);
+
+out_end_trans:
+ gfs2_trans_end(sdp);
+out_gunlock:
+ while (x--) {
+ gfs2_glock_dq(ghs + x);
+ gfs2_holder_uninit(ghs + x);
+ }
+out_gunlock_r:
+ if (r_gh.gh_gl)
+ gfs2_glock_dq_uninit(&r_gh);
+out:
+ return error;
+}
+
+static int gfs2_rename2(struct inode *odir, struct dentry *odentry,
+ struct inode *ndir, struct dentry *ndentry,
+ unsigned int flags)
+{
+ flags &= ~RENAME_NOREPLACE;
+
+ if (flags & ~RENAME_EXCHANGE)
+ return -EINVAL;
+
+ if (flags & RENAME_EXCHANGE)
+ return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
+
+ return gfs2_rename(odir, odentry, ndir, ndentry);
+}
+
/**
* gfs2_follow_link - Follow a symbolic link
* @dentry: The dentry of the link
* Returns: 0 on success or error code
*/
-static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
+static const char *gfs2_follow_link(struct dentry *dentry, void **cookie)
{
struct gfs2_inode *ip = GFS2_I(d_inode(dentry));
struct gfs2_holder i_gh;
error = gfs2_glock_nq(&i_gh);
if (error) {
gfs2_holder_uninit(&i_gh);
- nd_set_link(nd, ERR_PTR(error));
- return NULL;
+ return ERR_PTR(error);
}
size = (unsigned int)i_size_read(&ip->i_inode);
brelse(dibh);
out:
gfs2_glock_dq_uninit(&i_gh);
- nd_set_link(nd, buf);
- return NULL;
+ if (!IS_ERR(buf))
+ *cookie = buf;
+ return buf;
}
/**
if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
!gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
- gfs2_quota_change(ip, -ap.target, ouid, ogid);
+ gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
gfs2_quota_change(ip, ap.target, nuid, ngid);
}
.mkdir = gfs2_mkdir,
.rmdir = gfs2_unlink,
.mknod = gfs2_mknod,
- .rename = gfs2_rename,
+ .rename2 = gfs2_rename2,
.permission = gfs2_permission,
.setattr = gfs2_setattr,
.getattr = gfs2_getattr,
Code Review / kvmfornfv.git / blobdiff