renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-18 02:04:05 +08:00
Code
ade1d48b78
linux-next/fs/orangefs/pvfs2-utils.c
Al Viro 5714156be2 orangefs: sanitize pvfs2_convert_time_field() 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2015-11-13 11:54:05 -05:00

1157 lines
29 KiB
C
Raw Blame History

/*
* (C) 2001 Clemson University and The University of Chicago
*
* See COPYING in top-level directory.
*/
#include "protocol.h"
#include "pvfs2-kernel.h"
#include "pvfs2-dev-proto.h"
#include "pvfs2-bufmap.h"
__s32 fsid_of_op(struct pvfs2_kernel_op_s *op)
{
__s32 fsid = PVFS_FS_ID_NULL;
if (op) {
switch (op->upcall.type) {
case PVFS2_VFS_OP_FILE_IO:
fsid = op->upcall.req.io.refn.fs_id;
break;
case PVFS2_VFS_OP_LOOKUP:
fsid = op->upcall.req.lookup.parent_refn.fs_id;
break;
case PVFS2_VFS_OP_CREATE:
fsid = op->upcall.req.create.parent_refn.fs_id;
break;
case PVFS2_VFS_OP_GETATTR:
fsid = op->upcall.req.getattr.refn.fs_id;
break;
case PVFS2_VFS_OP_REMOVE:
fsid = op->upcall.req.remove.parent_refn.fs_id;
break;
case PVFS2_VFS_OP_MKDIR:
fsid = op->upcall.req.mkdir.parent_refn.fs_id;
break;
case PVFS2_VFS_OP_READDIR:
fsid = op->upcall.req.readdir.refn.fs_id;
break;
case PVFS2_VFS_OP_SETATTR:
fsid = op->upcall.req.setattr.refn.fs_id;
break;
case PVFS2_VFS_OP_SYMLINK:
fsid = op->upcall.req.sym.parent_refn.fs_id;
break;
case PVFS2_VFS_OP_RENAME:
fsid = op->upcall.req.rename.old_parent_refn.fs_id;
break;
case PVFS2_VFS_OP_STATFS:
fsid = op->upcall.req.statfs.fs_id;
break;
case PVFS2_VFS_OP_TRUNCATE:
fsid = op->upcall.req.truncate.refn.fs_id;
break;
case PVFS2_VFS_OP_MMAP_RA_FLUSH:
fsid = op->upcall.req.ra_cache_flush.refn.fs_id;
break;
case PVFS2_VFS_OP_FS_UMOUNT:
fsid = op->upcall.req.fs_umount.fs_id;
break;
case PVFS2_VFS_OP_GETXATTR:
fsid = op->upcall.req.getxattr.refn.fs_id;
break;
case PVFS2_VFS_OP_SETXATTR:
fsid = op->upcall.req.setxattr.refn.fs_id;
break;
case PVFS2_VFS_OP_LISTXATTR:
fsid = op->upcall.req.listxattr.refn.fs_id;
break;
case PVFS2_VFS_OP_REMOVEXATTR:
fsid = op->upcall.req.removexattr.refn.fs_id;
break;
case PVFS2_VFS_OP_FSYNC:
fsid = op->upcall.req.fsync.refn.fs_id;
break;
default:
break;
}
}
return fsid;
}
static void pvfs2_set_inode_flags(struct inode *inode,
struct PVFS_sys_attr_s *attrs)
{
if (attrs->flags & PVFS_IMMUTABLE_FL)
inode->i_flags |= S_IMMUTABLE;
else
inode->i_flags &= ~S_IMMUTABLE;
if (attrs->flags & PVFS_APPEND_FL)
inode->i_flags |= S_APPEND;
else
inode->i_flags &= ~S_APPEND;
if (attrs->flags & PVFS_NOATIME_FL)
inode->i_flags |= S_NOATIME;
else
inode->i_flags &= ~S_NOATIME;
}
/* NOTE: symname is ignored unless the inode is a sym link */
static int copy_attributes_to_inode(struct inode *inode,
struct PVFS_sys_attr_s *attrs,
char *symname)
{
int ret = -1;
int perm_mode = 0;
struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
loff_t inode_size = 0;
loff_t rounded_up_size = 0;
/*
* arbitrarily set the inode block size; FIXME: we need to
* resolve the difference between the reported inode blocksize
* and the PAGE_CACHE_SIZE, since our block count will always
* be wrong.
*
* For now, we're setting the block count to be the proper
* number assuming the block size is 512 bytes, and the size is
* rounded up to the nearest 4K. This is apparently required
* to get proper size reports from the 'du' shell utility.
*
* changing the inode->i_blkbits to something other than
* PAGE_CACHE_SHIFT breaks mmap/execution as we depend on that.
*/
gossip_debug(GOSSIP_UTILS_DEBUG,
"attrs->mask = %x (objtype = %s)\n",
attrs->mask,
attrs->objtype == PVFS_TYPE_METAFILE ? "file" :
attrs->objtype == PVFS_TYPE_DIRECTORY ? "directory" :
attrs->objtype == PVFS_TYPE_SYMLINK ? "symlink" :
"invalid/unknown");
switch (attrs->objtype) {
case PVFS_TYPE_METAFILE:
pvfs2_set_inode_flags(inode, attrs);
if (attrs->mask & PVFS_ATTR_SYS_SIZE) {
inode_size = (loff_t) attrs->size;
rounded_up_size =
(inode_size + (4096 - (inode_size % 4096)));
pvfs2_lock_inode(inode);
inode->i_bytes = inode_size;
inode->i_blocks =
(unsigned long)(rounded_up_size / 512);
pvfs2_unlock_inode(inode);
/*
* NOTE: make sure all the places we're called
* from have the inode->i_sem lock. We're fine
* in 99% of the cases since we're mostly
* called from a lookup.
*/
inode->i_size = inode_size;
}
break;
case PVFS_TYPE_SYMLINK:
if (symname != NULL) {
inode->i_size = (loff_t) strlen(symname);
break;
}
/*FALLTHRU*/
default:
inode->i_size = PAGE_CACHE_SIZE;
pvfs2_lock_inode(inode);
inode_set_bytes(inode, inode->i_size);
pvfs2_unlock_inode(inode);
break;
}
inode->i_uid = make_kuid(&init_user_ns, attrs->owner);
inode->i_gid = make_kgid(&init_user_ns, attrs->group);
inode->i_atime.tv_sec = (time_t) attrs->atime;
inode->i_mtime.tv_sec = (time_t) attrs->mtime;
inode->i_ctime.tv_sec = (time_t) attrs->ctime;
inode->i_atime.tv_nsec = 0;
inode->i_mtime.tv_nsec = 0;
inode->i_ctime.tv_nsec = 0;
if (attrs->perms & PVFS_O_EXECUTE)
perm_mode |= S_IXOTH;
if (attrs->perms & PVFS_O_WRITE)
perm_mode |= S_IWOTH;
if (attrs->perms & PVFS_O_READ)
perm_mode |= S_IROTH;
if (attrs->perms & PVFS_G_EXECUTE)
perm_mode |= S_IXGRP;
if (attrs->perms & PVFS_G_WRITE)
perm_mode |= S_IWGRP;
if (attrs->perms & PVFS_G_READ)
perm_mode |= S_IRGRP;
if (attrs->perms & PVFS_U_EXECUTE)
perm_mode |= S_IXUSR;
if (attrs->perms & PVFS_U_WRITE)
perm_mode |= S_IWUSR;
if (attrs->perms & PVFS_U_READ)
perm_mode |= S_IRUSR;
if (attrs->perms & PVFS_G_SGID)
perm_mode |= S_ISGID;
if (attrs->perms & PVFS_U_SUID)
perm_mode |= S_ISUID;
inode->i_mode = perm_mode;
if (is_root_handle(inode)) {
/* special case: mark the root inode as sticky */
inode->i_mode |= S_ISVTX;
gossip_debug(GOSSIP_UTILS_DEBUG,
"Marking inode %pU as sticky\n",
get_khandle_from_ino(inode));
}
switch (attrs->objtype) {
case PVFS_TYPE_METAFILE:
inode->i_mode |= S_IFREG;
ret = 0;
break;
case PVFS_TYPE_DIRECTORY:
inode->i_mode |= S_IFDIR;
/* NOTE: we have no good way to keep nlink consistent
* for directories across clients; keep constant at 1.
* Why 1? If we go with 2, then find(1) gets confused
* and won't work properly withouth the -noleaf option
*/
set_nlink(inode, 1);
ret = 0;
break;
case PVFS_TYPE_SYMLINK:
inode->i_mode |= S_IFLNK;
/* copy link target to inode private data */
if (pvfs2_inode && symname) {
strncpy(pvfs2_inode->link_target,
symname,
PVFS_NAME_MAX);
gossip_debug(GOSSIP_UTILS_DEBUG,
"Copied attr link target %s\n",
pvfs2_inode->link_target);
}
gossip_debug(GOSSIP_UTILS_DEBUG,
"symlink mode %o\n",
inode->i_mode);
ret = 0;
break;
default:
gossip_err("pvfs2: copy_attributes_to_inode: got invalid attribute type %x\n",
attrs->objtype);
}
gossip_debug(GOSSIP_UTILS_DEBUG,
"pvfs2: copy_attributes_to_inode: setting i_mode to %o, i_size to %lu\n",
inode->i_mode,
(unsigned long)i_size_read(inode));
return ret;
}
/*
* NOTE: in kernel land, we never use the sys_attr->link_target for
* anything, so don't bother copying it into the sys_attr object here.
*/
static inline int copy_attributes_from_inode(struct inode *inode,
struct PVFS_sys_attr_s *attrs,
struct iattr *iattr)
{
umode_t tmp_mode;
if (!iattr || !inode || !attrs) {
gossip_err("NULL iattr (%p), inode (%p), attrs (%p) "
"in copy_attributes_from_inode!\n",
iattr,
inode,
attrs);
return -EINVAL;
}
/*
* We need to be careful to only copy the attributes out of the
* iattr object that we know are valid.
*/
attrs->mask = 0;
if (iattr->ia_valid & ATTR_UID) {
attrs->owner = from_kuid(current_user_ns(), iattr->ia_uid);
attrs->mask |= PVFS_ATTR_SYS_UID;
gossip_debug(GOSSIP_UTILS_DEBUG, "(UID) %d\n", attrs->owner);
}
if (iattr->ia_valid & ATTR_GID) {
attrs->group = from_kgid(current_user_ns(), iattr->ia_gid);
attrs->mask |= PVFS_ATTR_SYS_GID;
gossip_debug(GOSSIP_UTILS_DEBUG, "(GID) %d\n", attrs->group);
}
if (iattr->ia_valid & ATTR_ATIME) {
attrs->mask |= PVFS_ATTR_SYS_ATIME;
if (iattr->ia_valid & ATTR_ATIME_SET) {
attrs->atime =
pvfs2_convert_time_field(&iattr->ia_atime);
attrs->mask |= PVFS_ATTR_SYS_ATIME_SET;
}
}
if (iattr->ia_valid & ATTR_MTIME) {
attrs->mask |= PVFS_ATTR_SYS_MTIME;
if (iattr->ia_valid & ATTR_MTIME_SET) {
attrs->mtime =
pvfs2_convert_time_field(&iattr->ia_mtime);
attrs->mask |= PVFS_ATTR_SYS_MTIME_SET;
}
}
if (iattr->ia_valid & ATTR_CTIME)
attrs->mask |= PVFS_ATTR_SYS_CTIME;
/*
* PVFS2 cannot set size with a setattr operation. Probably not likely
* to be requested through the VFS, but just in case, don't worry about
* ATTR_SIZE
*/
if (iattr->ia_valid & ATTR_MODE) {
tmp_mode = iattr->ia_mode;
if (tmp_mode & (S_ISVTX)) {
if (is_root_handle(inode)) {
/*
* allow sticky bit to be set on root (since
* it shows up that way by default anyhow),
* but don't show it to the server
*/
tmp_mode -= S_ISVTX;
} else {
gossip_debug(GOSSIP_UTILS_DEBUG,
"User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
return -EINVAL;
}
}
if (tmp_mode & (S_ISUID)) {
gossip_debug(GOSSIP_UTILS_DEBUG,
"Attempting to set setuid bit (not supported); returning EINVAL.\n");
return -EINVAL;
}
attrs->perms = PVFS_util_translate_mode(tmp_mode);
attrs->mask |= PVFS_ATTR_SYS_PERM;
}
return 0;
}
/*
* issues a pvfs2 getattr request and fills in the appropriate inode
* attributes if successful. returns 0 on success; -errno otherwise
*/
int pvfs2_inode_getattr(struct inode *inode, __u32 getattr_mask)
{
struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
struct pvfs2_kernel_op_s *new_op;
int ret = -EINVAL;
gossip_debug(GOSSIP_UTILS_DEBUG,
"%s: called on inode %pU\n",
__func__,
get_khandle_from_ino(inode));
new_op = op_alloc(PVFS2_VFS_OP_GETATTR);
if (!new_op)
return -ENOMEM;
new_op->upcall.req.getattr.refn = pvfs2_inode->refn;
new_op->upcall.req.getattr.mask = getattr_mask;
ret = service_operation(new_op, __func__,
get_interruptible_flag(inode));
if (ret != 0)
goto out;
if (copy_attributes_to_inode(inode,
&new_op->downcall.resp.getattr.attributes,
new_op->downcall.resp.getattr.link_target)) {
gossip_err("%s: failed to copy attributes\n", __func__);
ret = -ENOENT;
goto out;
}
/*
* Store blksize in pvfs2 specific part of inode structure; we are
* only going to use this to report to stat to make sure it doesn't
* perturb any inode related code paths.
*/
if (new_op->downcall.resp.getattr.attributes.objtype ==
PVFS_TYPE_METAFILE) {
pvfs2_inode->blksize =
new_op->downcall.resp.getattr.attributes.blksize;
} else {
/* mimic behavior of generic_fillattr() for other types. */
pvfs2_inode->blksize = (1 << inode->i_blkbits);
}
out:
gossip_debug(GOSSIP_UTILS_DEBUG,
"Getattr on handle %pU, "
"fsid %d\n (inode ct = %d) returned %d\n",
&pvfs2_inode->refn.khandle,
pvfs2_inode->refn.fs_id,
(int)atomic_read(&inode->i_count),
ret);
op_release(new_op);
return ret;
}
/*
* issues a pvfs2 setattr request to make sure the new attribute values
* take effect if successful. returns 0 on success; -errno otherwise
*/
int pvfs2_inode_setattr(struct inode *inode, struct iattr *iattr)
{
struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
struct pvfs2_kernel_op_s *new_op;
int ret;
new_op = op_alloc(PVFS2_VFS_OP_SETATTR);
if (!new_op)
return -ENOMEM;
new_op->upcall.req.setattr.refn = pvfs2_inode->refn;
ret = copy_attributes_from_inode(inode,
&new_op->upcall.req.setattr.attributes,
iattr);
if (ret < 0) {
op_release(new_op);
return ret;
}
ret = service_operation(new_op, __func__,
get_interruptible_flag(inode));
gossip_debug(GOSSIP_UTILS_DEBUG,
"pvfs2_inode_setattr: returning %d\n",
ret);
/* when request is serviced properly, free req op struct */
op_release(new_op);
/*
* successful setattr should clear the atime, mtime and
* ctime flags.
*/
if (ret == 0) {
ClearAtimeFlag(pvfs2_inode);
ClearMtimeFlag(pvfs2_inode);
ClearCtimeFlag(pvfs2_inode);
ClearModeFlag(pvfs2_inode);
}
return ret;
}
int pvfs2_flush_inode(struct inode *inode)
{
/*
* If it is a dirty inode, this function gets called.
* Gather all the information that needs to be setattr'ed
* Right now, this will only be used for mode, atime, mtime
* and/or ctime.
*/
struct iattr wbattr;
int ret;
int mtime_flag;
int ctime_flag;
int atime_flag;
int mode_flag;
struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
memset(&wbattr, 0, sizeof(wbattr));
/*
* check inode flags up front, and clear them if they are set. This
* will prevent multiple processes from all trying to flush the same
* inode if they call close() simultaneously
*/
mtime_flag = MtimeFlag(pvfs2_inode);
ClearMtimeFlag(pvfs2_inode);
ctime_flag = CtimeFlag(pvfs2_inode);
ClearCtimeFlag(pvfs2_inode);
atime_flag = AtimeFlag(pvfs2_inode);
ClearAtimeFlag(pvfs2_inode);
mode_flag = ModeFlag(pvfs2_inode);
ClearModeFlag(pvfs2_inode);
/* -- Lazy atime,mtime and ctime update --
* Note: all times are dictated by server in the new scheme
* and not by the clients
*
* Also mode updates are being handled now..
*/
if (mtime_flag)
wbattr.ia_valid |= ATTR_MTIME;
if (ctime_flag)
wbattr.ia_valid |= ATTR_CTIME;
if (atime_flag)
wbattr.ia_valid |= ATTR_ATIME;
if (mode_flag) {
wbattr.ia_mode = inode->i_mode;
wbattr.ia_valid |= ATTR_MODE;
}
gossip_debug(GOSSIP_UTILS_DEBUG,
"*********** pvfs2_flush_inode: %pU "
"(ia_valid %d)\n",
get_khandle_from_ino(inode),
wbattr.ia_valid);
if (wbattr.ia_valid == 0) {
gossip_debug(GOSSIP_UTILS_DEBUG,
"pvfs2_flush_inode skipping setattr()\n");
return 0;
}
gossip_debug(GOSSIP_UTILS_DEBUG,
"pvfs2_flush_inode (%pU) writing mode %o\n",
get_khandle_from_ino(inode),
inode->i_mode);
ret = pvfs2_inode_setattr(inode, &wbattr);
return ret;
}
int pvfs2_unmount_sb(struct super_block *sb)
{
int ret = -EINVAL;
struct pvfs2_kernel_op_s *new_op = NULL;
gossip_debug(GOSSIP_UTILS_DEBUG,
"pvfs2_unmount_sb called on sb %p\n",
sb);
new_op = op_alloc(PVFS2_VFS_OP_FS_UMOUNT);
if (!new_op)
return -ENOMEM;
new_op->upcall.req.fs_umount.id = PVFS2_SB(sb)->id;
new_op->upcall.req.fs_umount.fs_id = PVFS2_SB(sb)->fs_id;
strncpy(new_op->upcall.req.fs_umount.pvfs2_config_server,
PVFS2_SB(sb)->devname,
PVFS_MAX_SERVER_ADDR_LEN);
gossip_debug(GOSSIP_UTILS_DEBUG,
"Attempting PVFS2 Unmount via host %s\n",
new_op->upcall.req.fs_umount.pvfs2_config_server);
ret = service_operation(new_op, "pvfs2_fs_umount", 0);
gossip_debug(GOSSIP_UTILS_DEBUG,
"pvfs2_unmount: got return value of %d\n", ret);
if (ret)
sb = ERR_PTR(ret);
else
PVFS2_SB(sb)->mount_pending = 1;
op_release(new_op);
return ret;
}
/*
* NOTE: on successful cancellation, be sure to return -EINTR, as
* that's the return value the caller expects
*/
int pvfs2_cancel_op_in_progress(__u64 tag)
{
int ret = -EINVAL;
struct pvfs2_kernel_op_s *new_op = NULL;
gossip_debug(GOSSIP_UTILS_DEBUG,
"pvfs2_cancel_op_in_progress called on tag %llu\n",
llu(tag));
new_op = op_alloc(PVFS2_VFS_OP_CANCEL);
if (!new_op)
return -ENOMEM;
new_op->upcall.req.cancel.op_tag = tag;
gossip_debug(GOSSIP_UTILS_DEBUG,
"Attempting PVFS2 operation cancellation of tag %llu\n",
llu(new_op->upcall.req.cancel.op_tag));
ret = service_operation(new_op, "pvfs2_cancel", PVFS2_OP_CANCELLATION);
gossip_debug(GOSSIP_UTILS_DEBUG,
"pvfs2_cancel_op_in_progress: got return value of %d\n",
ret);
op_release(new_op);
return ret;
}
void pvfs2_op_initialize(struct pvfs2_kernel_op_s *op)
{
if (op) {
spin_lock(&op->lock);
op->io_completed = 0;
op->upcall.type = PVFS2_VFS_OP_INVALID;
op->downcall.type = PVFS2_VFS_OP_INVALID;
op->downcall.status = -1;
op->op_state = OP_VFS_STATE_UNKNOWN;
op->tag = 0;
spin_unlock(&op->lock);
}
}
void pvfs2_make_bad_inode(struct inode *inode)
{
if (is_root_handle(inode)) {
/*
* if this occurs, the pvfs2-client-core was killed but we
* can't afford to lose the inode operations and such
* associated with the root handle in any case.
*/
gossip_debug(GOSSIP_UTILS_DEBUG,
"*** NOT making bad root inode %pU\n",
get_khandle_from_ino(inode));
} else {
gossip_debug(GOSSIP_UTILS_DEBUG,
"*** making bad inode %pU\n",
get_khandle_from_ino(inode));
make_bad_inode(inode);
}
}
/* Block all blockable signals... */
void block_signals(sigset_t *orig_sigset)
{
sigset_t mask;
/*
* Initialize all entries in the signal set to the
* inverse of the given mask.
*/
siginitsetinv(&mask, sigmask(SIGKILL));
/* Block 'em Danno... */
sigprocmask(SIG_BLOCK, &mask, orig_sigset);
}
/* set the signal mask to the given template... */
void set_signals(sigset_t *sigset)
{
sigprocmask(SIG_SETMASK, sigset, NULL);
}
/*
* The following is a very dirty hack that is now a permanent part of the
* PVFS2 protocol. See protocol.h for more error definitions.
*/
/* The order matches include/pvfs2-types.h in the OrangeFS source. */
static int PINT_errno_mapping[] = {
0, EPERM, ENOENT, EINTR, EIO, ENXIO, EBADF, EAGAIN, ENOMEM,
EFAULT, EBUSY, EEXIST, ENODEV, ENOTDIR, EISDIR, EINVAL, EMFILE,
EFBIG, ENOSPC, EROFS, EMLINK, EPIPE, EDEADLK, ENAMETOOLONG,
ENOLCK, ENOSYS, ENOTEMPTY, ELOOP, EWOULDBLOCK, ENOMSG, EUNATCH,
EBADR, EDEADLOCK, ENODATA, ETIME, ENONET, EREMOTE, ECOMM,
EPROTO, EBADMSG, EOVERFLOW, ERESTART, EMSGSIZE, EPROTOTYPE,
ENOPROTOOPT, EPROTONOSUPPORT, EOPNOTSUPP, EADDRINUSE,
EADDRNOTAVAIL, ENETDOWN, ENETUNREACH, ENETRESET, ENOBUFS,
ETIMEDOUT, ECONNREFUSED, EHOSTDOWN, EHOSTUNREACH, EALREADY,
EACCES, ECONNRESET, ERANGE
};
int pvfs2_normalize_to_errno(__s32 error_code)
{
__u32 i;
/* Success */
if (error_code == 0) {
return 0;
/*
* This shouldn't ever happen. If it does it should be fixed on the
* server.
*/
} else if (error_code > 0) {
gossip_err("pvfs2: error status receieved.\n");
gossip_err("pvfs2: assuming error code is inverted.\n");
error_code = -error_code;
}
/*
* XXX: This is very bad since error codes from PVFS2 may not be
* suitable for return into userspace.
*/
/*
* Convert PVFS2 error values into errno values suitable for return
* from the kernel.
*/
if ((-error_code) & PVFS_NON_ERRNO_ERROR_BIT) {
if (((-error_code) &
(PVFS_ERROR_NUMBER_BITS|PVFS_NON_ERRNO_ERROR_BIT|
PVFS_ERROR_BIT)) == PVFS_ECANCEL) {
/*
* cancellation error codes generally correspond to
* a timeout from the client's perspective
*/
error_code = -ETIMEDOUT;
} else {
/* assume a default error code */
gossip_err("pvfs2: warning: got error code without errno equivalent: %d.\n", error_code);
error_code = -EINVAL;
}
/* Convert PVFS2 encoded errno values into regular errno values. */
} else if ((-error_code) & PVFS_ERROR_BIT) {
i = (-error_code) & ~(PVFS_ERROR_BIT|PVFS_ERROR_CLASS_BITS);
if (i < sizeof(PINT_errno_mapping)/sizeof(*PINT_errno_mapping))
error_code = -PINT_errno_mapping[i];
else
error_code = -EINVAL;
/*
* Only PVFS2 protocol error codes should ever come here. Otherwise
* there is a bug somewhere.
*/
} else {
gossip_err("pvfs2: pvfs2_normalize_to_errno: got error code which is not from PVFS2.\n");
}
return error_code;
}
#define NUM_MODES 11
__s32 PVFS_util_translate_mode(int mode)
{
int ret = 0;
int i = 0;
static int modes[NUM_MODES] = {
S_IXOTH, S_IWOTH, S_IROTH,
S_IXGRP, S_IWGRP, S_IRGRP,
S_IXUSR, S_IWUSR, S_IRUSR,
S_ISGID, S_ISUID
};
static int pvfs2_modes[NUM_MODES] = {
PVFS_O_EXECUTE, PVFS_O_WRITE, PVFS_O_READ,
PVFS_G_EXECUTE, PVFS_G_WRITE, PVFS_G_READ,
PVFS_U_EXECUTE, PVFS_U_WRITE, PVFS_U_READ,
PVFS_G_SGID, PVFS_U_SUID
};
for (i = 0; i < NUM_MODES; i++)
if (mode & modes[i])
ret |= pvfs2_modes[i];
return ret;
}
#undef NUM_MODES
/*
* After obtaining a string representation of the client's debug
* keywords and their associated masks, this function is called to build an
* array of these values.
*/
int orangefs_prepare_cdm_array(char *debug_array_string)
{
int i;
int rc = -EINVAL;
char *cds_head = NULL;
char *cds_delimiter = NULL;
int keyword_len = 0;
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
/*
* figure out how many elements the cdm_array needs.
*/
for (i = 0; i < strlen(debug_array_string); i++)
if (debug_array_string[i] == '\n')
cdm_element_count++;
if (!cdm_element_count) {
pr_info("No elements in client debug array string!\n");
goto out;
}
cdm_array =
kzalloc(cdm_element_count * sizeof(struct client_debug_mask),
GFP_KERNEL);
if (!cdm_array) {
pr_info("malloc failed for cdm_array!\n");
rc = -ENOMEM;
goto out;
}
cds_head = debug_array_string;
for (i = 0; i < cdm_element_count; i++) {
cds_delimiter = strchr(cds_head, '\n');
*cds_delimiter = '\0';
keyword_len = strcspn(cds_head, " ");
cdm_array[i].keyword = kzalloc(keyword_len + 1, GFP_KERNEL);
if (!cdm_array[i].keyword) {
rc = -ENOMEM;
goto out;
}
sscanf(cds_head,
"%s %llx %llx",
cdm_array[i].keyword,
(unsigned long long *)&(cdm_array[i].mask1),
(unsigned long long *)&(cdm_array[i].mask2));
if (!strcmp(cdm_array[i].keyword, PVFS2_VERBOSE))
client_verbose_index = i;
if (!strcmp(cdm_array[i].keyword, PVFS2_ALL))
client_all_index = i;
cds_head = cds_delimiter + 1;
}
rc = cdm_element_count;
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: rc:%d:\n", __func__, rc);
out:
return rc;
}
/*
* /sys/kernel/debug/orangefs/debug-help can be catted to
* see all the available kernel and client debug keywords.
*
* When the kernel boots, we have no idea what keywords the
* client supports, nor their associated masks.
*
* We pass through this function once at boot and stamp a
* boilerplate "we don't know" message for the client in the
* debug-help file. We pass through here again when the client
* starts and then we can fill out the debug-help file fully.
*
* The client might be restarted any number of times between
* reboots, we only build the debug-help file the first time.
*/
int orangefs_prepare_debugfs_help_string(int at_boot)
{
int rc = -EINVAL;
int i;
int byte_count = 0;
char *client_title = "Client Debug Keywords:\n";
char *kernel_title = "Kernel Debug Keywords:\n";
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
if (at_boot) {
byte_count += strlen(HELP_STRING_UNINITIALIZED);
client_title = HELP_STRING_UNINITIALIZED;
} else {
/*
* fill the client keyword/mask array and remember
* how many elements there were.
*/
cdm_element_count =
orangefs_prepare_cdm_array(client_debug_array_string);
if (cdm_element_count <= 0)
goto out;
/* Count the bytes destined for debug_help_string. */
byte_count += strlen(client_title);
for (i = 0; i < cdm_element_count; i++) {
byte_count += strlen(cdm_array[i].keyword + 2);
if (byte_count >= DEBUG_HELP_STRING_SIZE) {
pr_info("%s: overflow 1!\n", __func__);
goto out;
}
}
gossip_debug(GOSSIP_UTILS_DEBUG,
"%s: cdm_element_count:%d:\n",
__func__,
cdm_element_count);
}
byte_count += strlen(kernel_title);
for (i = 0; i < num_kmod_keyword_mask_map; i++) {
byte_count +=
strlen(s_kmod_keyword_mask_map[i].keyword + 2);
if (byte_count >= DEBUG_HELP_STRING_SIZE) {
pr_info("%s: overflow 2!\n", __func__);
goto out;
}
}
/* build debug_help_string. */
debug_help_string = kzalloc(DEBUG_HELP_STRING_SIZE, GFP_KERNEL);
if (!debug_help_string) {
rc = -ENOMEM;
goto out;
}
strcat(debug_help_string, client_title);
if (!at_boot) {
for (i = 0; i < cdm_element_count; i++) {
strcat(debug_help_string, "\t");
strcat(debug_help_string, cdm_array[i].keyword);
strcat(debug_help_string, "\n");
}
}
strcat(debug_help_string, "\n");
strcat(debug_help_string, kernel_title);
for (i = 0; i < num_kmod_keyword_mask_map; i++) {
strcat(debug_help_string, "\t");
strcat(debug_help_string, s_kmod_keyword_mask_map[i].keyword);
strcat(debug_help_string, "\n");
}
rc = 0;
out:
return rc;
}
/*
* kernel = type 0
* client = type 1
*/
void debug_mask_to_string(void *mask, int type)
{
int i;
int len = 0;
char *debug_string;
int element_count = 0;
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
if (type) {
debug_string = client_debug_string;
element_count = cdm_element_count;
} else {
debug_string = kernel_debug_string;
element_count = num_kmod_keyword_mask_map;
}
memset(debug_string, 0, PVFS2_MAX_DEBUG_STRING_LEN);
/*
* Some keywords, like "all" or "verbose", are amalgams of
* numerous other keywords. Make a special check for those
* before grinding through the whole mask only to find out
* later...
*/
if (check_amalgam_keyword(mask, type))
goto out;
/* Build the debug string. */
for (i = 0; i < element_count; i++)
if (type)
do_c_string(mask, i);
else
do_k_string(mask, i);
len = strlen(debug_string);
if ((len) && (type))
client_debug_string[len - 1] = '\0';
else if (len)
kernel_debug_string[len - 1] = '\0';
else if (type)
strcpy(client_debug_string, "none");
else
strcpy(kernel_debug_string, "none");
out:
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: string:%s:\n", __func__, debug_string);
return;
}
void do_k_string(void *k_mask, int index)
{
__u64 *mask = (__u64 *) k_mask;
if (keyword_is_amalgam((char *) s_kmod_keyword_mask_map[index].keyword))
goto out;
if (*mask & s_kmod_keyword_mask_map[index].mask_val) {
if ((strlen(kernel_debug_string) +
strlen(s_kmod_keyword_mask_map[index].keyword))
< PVFS2_MAX_DEBUG_STRING_LEN - 1) {
strcat(kernel_debug_string,
s_kmod_keyword_mask_map[index].keyword);
strcat(kernel_debug_string, ",");
} else {
gossip_err("%s: overflow!\n", __func__);
strcpy(kernel_debug_string, PVFS2_ALL);
goto out;
}
}
out:
return;
}
void do_c_string(void *c_mask, int index)
{
struct client_debug_mask *mask = (struct client_debug_mask *) c_mask;
if (keyword_is_amalgam(cdm_array[index].keyword))
goto out;
if ((mask->mask1 & cdm_array[index].mask1) ||
(mask->mask2 & cdm_array[index].mask2)) {
if ((strlen(client_debug_string) +
strlen(cdm_array[index].keyword) + 1)
< PVFS2_MAX_DEBUG_STRING_LEN - 2) {
strcat(client_debug_string,
cdm_array[index].keyword);
strcat(client_debug_string, ",");
} else {
gossip_err("%s: overflow!\n", __func__);
strcpy(client_debug_string, PVFS2_ALL);
goto out;
}
}
out:
return;
}
int keyword_is_amalgam(char *keyword)
{
int rc = 0;
if ((!strcmp(keyword, PVFS2_ALL)) || (!strcmp(keyword, PVFS2_VERBOSE)))
rc = 1;
return rc;
}
/*
* kernel = type 0
* client = type 1
*
* return 1 if we found an amalgam.
*/
int check_amalgam_keyword(void *mask, int type)
{
__u64 *k_mask;
struct client_debug_mask *c_mask;
int k_all_index = num_kmod_keyword_mask_map - 1;
int rc = 0;
if (type) {
c_mask = (struct client_debug_mask *) mask;
if ((c_mask->mask1 == cdm_array[client_all_index].mask1) &&
(c_mask->mask2 == cdm_array[client_all_index].mask2)) {
strcpy(client_debug_string, PVFS2_ALL);
rc = 1;
goto out;
}
if ((c_mask->mask1 == cdm_array[client_verbose_index].mask1) &&
(c_mask->mask2 == cdm_array[client_verbose_index].mask2)) {
strcpy(client_debug_string, PVFS2_VERBOSE);
rc = 1;
goto out;
}
} else {
k_mask = (__u64 *) mask;
if (*k_mask >= s_kmod_keyword_mask_map[k_all_index].mask_val) {
strcpy(kernel_debug_string, PVFS2_ALL);
rc = 1;
goto out;
}
}
out:
return rc;
}
/*
* kernel = type 0
* client = type 1
*/
void debug_string_to_mask(char *debug_string, void *mask, int type)
{
char *unchecked_keyword;
int i;
char *strsep_fodder = kstrdup(debug_string, GFP_KERNEL);
char *original_pointer;
int element_count = 0;
struct client_debug_mask *c_mask;
__u64 *k_mask;
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: start\n", __func__);
if (type) {
c_mask = (struct client_debug_mask *)mask;
element_count = cdm_element_count;
} else {
k_mask = (__u64 *)mask;
*k_mask = 0;
element_count = num_kmod_keyword_mask_map;
}
original_pointer = strsep_fodder;
while ((unchecked_keyword = strsep(&strsep_fodder, ",")))
if (strlen(unchecked_keyword)) {
for (i = 0; i < element_count; i++)
if (type)
do_c_mask(i,
unchecked_keyword,
&c_mask);
else
do_k_mask(i,
unchecked_keyword,
&k_mask);
}
kfree(original_pointer);
}
void do_c_mask(int i,
char *unchecked_keyword,
struct client_debug_mask **sane_mask)
{
if (!strcmp(cdm_array[i].keyword, unchecked_keyword)) {
(**sane_mask).mask1 = (**sane_mask).mask1 | cdm_array[i].mask1;
(**sane_mask).mask2 = (**sane_mask).mask2 | cdm_array[i].mask2;
}
}
void do_k_mask(int i, char *unchecked_keyword, __u64 **sane_mask)
{
if (!strcmp(s_kmod_keyword_mask_map[i].keyword, unchecked_keyword))
**sane_mask = (**sane_mask) |
s_kmod_keyword_mask_map[i].mask_val;
}
View Git Blame Copy Permalink