forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
446 lines
12 KiB
446 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* (C) 2001 Clemson University and The University of Chicago |
|
* |
|
* See COPYING in top-level directory. |
|
*/ |
|
|
|
/* |
|
* Linux VFS namei operations. |
|
*/ |
|
|
|
#include "protocol.h" |
|
#include "orangefs-kernel.h" |
|
|
|
/* |
|
* Get a newly allocated inode to go with a negative dentry. |
|
*/ |
|
static int orangefs_create(struct user_namespace *mnt_userns, |
|
struct inode *dir, |
|
struct dentry *dentry, |
|
umode_t mode, |
|
bool exclusive) |
|
{ |
|
struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
|
struct orangefs_kernel_op_s *new_op; |
|
struct orangefs_object_kref ref; |
|
struct inode *inode; |
|
struct iattr iattr; |
|
int ret; |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, "%s: %pd\n", |
|
__func__, |
|
dentry); |
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_CREATE); |
|
if (!new_op) |
|
return -ENOMEM; |
|
|
|
new_op->upcall.req.create.parent_refn = parent->refn; |
|
|
|
fill_default_sys_attrs(new_op->upcall.req.create.attributes, |
|
ORANGEFS_TYPE_METAFILE, mode); |
|
|
|
strncpy(new_op->upcall.req.create.d_name, |
|
dentry->d_name.name, ORANGEFS_NAME_MAX - 1); |
|
|
|
ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: %pd: handle:%pU: fsid:%d: new_op:%p: ret:%d:\n", |
|
__func__, |
|
dentry, |
|
&new_op->downcall.resp.create.refn.khandle, |
|
new_op->downcall.resp.create.refn.fs_id, |
|
new_op, |
|
ret); |
|
|
|
if (ret < 0) |
|
goto out; |
|
|
|
ref = new_op->downcall.resp.create.refn; |
|
|
|
inode = orangefs_new_inode(dir->i_sb, dir, S_IFREG | mode, 0, &ref); |
|
if (IS_ERR(inode)) { |
|
gossip_err("%s: Failed to allocate inode for file :%pd:\n", |
|
__func__, |
|
dentry); |
|
ret = PTR_ERR(inode); |
|
goto out; |
|
} |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: Assigned inode :%pU: for file :%pd:\n", |
|
__func__, |
|
get_khandle_from_ino(inode), |
|
dentry); |
|
|
|
d_instantiate_new(dentry, inode); |
|
orangefs_set_timeout(dentry); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: dentry instantiated for %pd\n", |
|
__func__, |
|
dentry); |
|
|
|
memset(&iattr, 0, sizeof iattr); |
|
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; |
|
iattr.ia_mtime = iattr.ia_ctime = current_time(dir); |
|
__orangefs_setattr(dir, &iattr); |
|
ret = 0; |
|
out: |
|
op_release(new_op); |
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: %pd: returning %d\n", |
|
__func__, |
|
dentry, |
|
ret); |
|
return ret; |
|
} |
|
|
|
/* |
|
* Attempt to resolve an object name (dentry->d_name), parent handle, and |
|
* fsid into a handle for the object. |
|
*/ |
|
static struct dentry *orangefs_lookup(struct inode *dir, struct dentry *dentry, |
|
unsigned int flags) |
|
{ |
|
struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
|
struct orangefs_kernel_op_s *new_op; |
|
struct inode *inode; |
|
int ret = -EINVAL; |
|
|
|
/* |
|
* in theory we could skip a lookup here (if the intent is to |
|
* create) in order to avoid a potentially failed lookup, but |
|
* leaving it in can skip a valid lookup and try to create a file |
|
* that already exists (e.g. the vfs already handles checking for |
|
* -EEXIST on O_EXCL opens, which is broken if we skip this lookup |
|
* in the create path) |
|
*/ |
|
gossip_debug(GOSSIP_NAME_DEBUG, "%s called on %pd\n", |
|
__func__, dentry); |
|
|
|
if (dentry->d_name.len > (ORANGEFS_NAME_MAX - 1)) |
|
return ERR_PTR(-ENAMETOOLONG); |
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_LOOKUP); |
|
if (!new_op) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
new_op->upcall.req.lookup.sym_follow = ORANGEFS_LOOKUP_LINK_NO_FOLLOW; |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, "%s:%s:%d using parent %pU\n", |
|
__FILE__, |
|
__func__, |
|
__LINE__, |
|
&parent->refn.khandle); |
|
new_op->upcall.req.lookup.parent_refn = parent->refn; |
|
|
|
strncpy(new_op->upcall.req.lookup.d_name, dentry->d_name.name, |
|
ORANGEFS_NAME_MAX - 1); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: doing lookup on %s under %pU,%d\n", |
|
__func__, |
|
new_op->upcall.req.lookup.d_name, |
|
&new_op->upcall.req.lookup.parent_refn.khandle, |
|
new_op->upcall.req.lookup.parent_refn.fs_id); |
|
|
|
ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"Lookup Got %pU, fsid %d (ret=%d)\n", |
|
&new_op->downcall.resp.lookup.refn.khandle, |
|
new_op->downcall.resp.lookup.refn.fs_id, |
|
ret); |
|
|
|
if (ret == 0) { |
|
orangefs_set_timeout(dentry); |
|
inode = orangefs_iget(dir->i_sb, &new_op->downcall.resp.lookup.refn); |
|
} else if (ret == -ENOENT) { |
|
inode = NULL; |
|
} else { |
|
/* must be a non-recoverable error */ |
|
inode = ERR_PTR(ret); |
|
} |
|
|
|
op_release(new_op); |
|
return d_splice_alias(inode, dentry); |
|
} |
|
|
|
/* return 0 on success; non-zero otherwise */ |
|
static int orangefs_unlink(struct inode *dir, struct dentry *dentry) |
|
{ |
|
struct inode *inode = dentry->d_inode; |
|
struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
|
struct orangefs_kernel_op_s *new_op; |
|
struct iattr iattr; |
|
int ret; |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: called on %pd\n" |
|
" (inode %pU): Parent is %pU | fs_id %d\n", |
|
__func__, |
|
dentry, |
|
get_khandle_from_ino(inode), |
|
&parent->refn.khandle, |
|
parent->refn.fs_id); |
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE); |
|
if (!new_op) |
|
return -ENOMEM; |
|
|
|
new_op->upcall.req.remove.parent_refn = parent->refn; |
|
strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name, |
|
ORANGEFS_NAME_MAX - 1); |
|
|
|
ret = service_operation(new_op, "orangefs_unlink", |
|
get_interruptible_flag(inode)); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: service_operation returned:%d:\n", |
|
__func__, |
|
ret); |
|
|
|
op_release(new_op); |
|
|
|
if (!ret) { |
|
drop_nlink(inode); |
|
|
|
memset(&iattr, 0, sizeof iattr); |
|
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; |
|
iattr.ia_mtime = iattr.ia_ctime = current_time(dir); |
|
__orangefs_setattr(dir, &iattr); |
|
} |
|
return ret; |
|
} |
|
|
|
static int orangefs_symlink(struct user_namespace *mnt_userns, |
|
struct inode *dir, |
|
struct dentry *dentry, |
|
const char *symname) |
|
{ |
|
struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
|
struct orangefs_kernel_op_s *new_op; |
|
struct orangefs_object_kref ref; |
|
struct inode *inode; |
|
struct iattr iattr; |
|
int mode = 0755; |
|
int ret; |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__); |
|
|
|
if (!symname) |
|
return -EINVAL; |
|
|
|
if (strlen(symname)+1 > ORANGEFS_NAME_MAX) |
|
return -ENAMETOOLONG; |
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK); |
|
if (!new_op) |
|
return -ENOMEM; |
|
|
|
new_op->upcall.req.sym.parent_refn = parent->refn; |
|
|
|
fill_default_sys_attrs(new_op->upcall.req.sym.attributes, |
|
ORANGEFS_TYPE_SYMLINK, |
|
mode); |
|
|
|
strncpy(new_op->upcall.req.sym.entry_name, |
|
dentry->d_name.name, |
|
ORANGEFS_NAME_MAX - 1); |
|
strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX - 1); |
|
|
|
ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n", |
|
&new_op->downcall.resp.sym.refn.khandle, |
|
new_op->downcall.resp.sym.refn.fs_id, ret); |
|
|
|
if (ret < 0) { |
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: failed with error code %d\n", |
|
__func__, ret); |
|
goto out; |
|
} |
|
|
|
ref = new_op->downcall.resp.sym.refn; |
|
|
|
inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0, &ref); |
|
if (IS_ERR(inode)) { |
|
gossip_err |
|
("*** Failed to allocate orangefs symlink inode\n"); |
|
ret = PTR_ERR(inode); |
|
goto out; |
|
} |
|
/* |
|
* This is necessary because orangefs_inode_getattr will not |
|
* re-read symlink size as it is impossible for it to change. |
|
* Invalidating the cache does not help. orangefs_new_inode |
|
* does not set the correct size (it does not know symname). |
|
*/ |
|
inode->i_size = strlen(symname); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"Assigned symlink inode new number of %pU\n", |
|
get_khandle_from_ino(inode)); |
|
|
|
d_instantiate_new(dentry, inode); |
|
orangefs_set_timeout(dentry); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"Inode (Symlink) %pU -> %pd\n", |
|
get_khandle_from_ino(inode), |
|
dentry); |
|
|
|
memset(&iattr, 0, sizeof iattr); |
|
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; |
|
iattr.ia_mtime = iattr.ia_ctime = current_time(dir); |
|
__orangefs_setattr(dir, &iattr); |
|
ret = 0; |
|
out: |
|
op_release(new_op); |
|
return ret; |
|
} |
|
|
|
static int orangefs_mkdir(struct user_namespace *mnt_userns, struct inode *dir, |
|
struct dentry *dentry, umode_t mode) |
|
{ |
|
struct orangefs_inode_s *parent = ORANGEFS_I(dir); |
|
struct orangefs_kernel_op_s *new_op; |
|
struct orangefs_object_kref ref; |
|
struct inode *inode; |
|
struct iattr iattr; |
|
int ret; |
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR); |
|
if (!new_op) |
|
return -ENOMEM; |
|
|
|
new_op->upcall.req.mkdir.parent_refn = parent->refn; |
|
|
|
fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes, |
|
ORANGEFS_TYPE_DIRECTORY, mode); |
|
|
|
strncpy(new_op->upcall.req.mkdir.d_name, |
|
dentry->d_name.name, ORANGEFS_NAME_MAX - 1); |
|
|
|
ret = service_operation(new_op, __func__, get_interruptible_flag(dir)); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"Mkdir Got ORANGEFS handle %pU on fsid %d\n", |
|
&new_op->downcall.resp.mkdir.refn.khandle, |
|
new_op->downcall.resp.mkdir.refn.fs_id); |
|
|
|
if (ret < 0) { |
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"%s: failed with error code %d\n", |
|
__func__, ret); |
|
goto out; |
|
} |
|
|
|
ref = new_op->downcall.resp.mkdir.refn; |
|
|
|
inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0, &ref); |
|
if (IS_ERR(inode)) { |
|
gossip_err("*** Failed to allocate orangefs dir inode\n"); |
|
ret = PTR_ERR(inode); |
|
goto out; |
|
} |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"Assigned dir inode new number of %pU\n", |
|
get_khandle_from_ino(inode)); |
|
|
|
d_instantiate_new(dentry, inode); |
|
orangefs_set_timeout(dentry); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"Inode (Directory) %pU -> %pd\n", |
|
get_khandle_from_ino(inode), |
|
dentry); |
|
|
|
/* |
|
* NOTE: we have no good way to keep nlink consistent for directories |
|
* across clients; keep constant at 1. |
|
*/ |
|
memset(&iattr, 0, sizeof iattr); |
|
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; |
|
iattr.ia_mtime = iattr.ia_ctime = current_time(dir); |
|
__orangefs_setattr(dir, &iattr); |
|
out: |
|
op_release(new_op); |
|
return ret; |
|
} |
|
|
|
static int orangefs_rename(struct user_namespace *mnt_userns, |
|
struct inode *old_dir, |
|
struct dentry *old_dentry, |
|
struct inode *new_dir, |
|
struct dentry *new_dentry, |
|
unsigned int flags) |
|
{ |
|
struct orangefs_kernel_op_s *new_op; |
|
struct iattr iattr; |
|
int ret; |
|
|
|
if (flags) |
|
return -EINVAL; |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"orangefs_rename: called (%pd2 => %pd2) ct=%d\n", |
|
old_dentry, new_dentry, d_count(new_dentry)); |
|
|
|
memset(&iattr, 0, sizeof iattr); |
|
iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME; |
|
iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir); |
|
__orangefs_setattr(new_dir, &iattr); |
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_RENAME); |
|
if (!new_op) |
|
return -EINVAL; |
|
|
|
new_op->upcall.req.rename.old_parent_refn = ORANGEFS_I(old_dir)->refn; |
|
new_op->upcall.req.rename.new_parent_refn = ORANGEFS_I(new_dir)->refn; |
|
|
|
strncpy(new_op->upcall.req.rename.d_old_name, |
|
old_dentry->d_name.name, |
|
ORANGEFS_NAME_MAX - 1); |
|
strncpy(new_op->upcall.req.rename.d_new_name, |
|
new_dentry->d_name.name, |
|
ORANGEFS_NAME_MAX - 1); |
|
|
|
ret = service_operation(new_op, |
|
"orangefs_rename", |
|
get_interruptible_flag(old_dentry->d_inode)); |
|
|
|
gossip_debug(GOSSIP_NAME_DEBUG, |
|
"orangefs_rename: got downcall status %d\n", |
|
ret); |
|
|
|
if (new_dentry->d_inode) |
|
new_dentry->d_inode->i_ctime = current_time(new_dentry->d_inode); |
|
|
|
op_release(new_op); |
|
return ret; |
|
} |
|
|
|
/* ORANGEFS implementation of VFS inode operations for directories */ |
|
const struct inode_operations orangefs_dir_inode_operations = { |
|
.lookup = orangefs_lookup, |
|
.get_acl = orangefs_get_acl, |
|
.set_acl = orangefs_set_acl, |
|
.create = orangefs_create, |
|
.unlink = orangefs_unlink, |
|
.symlink = orangefs_symlink, |
|
.mkdir = orangefs_mkdir, |
|
.rmdir = orangefs_unlink, |
|
.rename = orangefs_rename, |
|
.setattr = orangefs_setattr, |
|
.getattr = orangefs_getattr, |
|
.listxattr = orangefs_listxattr, |
|
.permission = orangefs_permission, |
|
.update_time = orangefs_update_time, |
|
};
|
|
|