--- /dev/null
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "pvfs2-kernel.h"
+#include "pvfs2-bufmap.h"
+#include <linux/posix_acl_xattr.h>
+#include <linux/fs_struct.h>
+
+struct posix_acl *pvfs2_get_acl(struct inode *inode, int type)
+{
+ struct posix_acl *acl;
+ int ret;
+ char *key = NULL, *value = NULL;
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ key = PVFS2_XATTR_NAME_ACL_ACCESS;
+ break;
+ case ACL_TYPE_DEFAULT:
+ key = PVFS2_XATTR_NAME_ACL_DEFAULT;
+ break;
+ default:
+ gossip_err("pvfs2_get_acl: bogus value of type %d\n", type);
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * Rather than incurring a network call just to determine the exact
+ * length of the attribute, I just allocate a max length to save on
+ * the network call. Conceivably, we could pass NULL to
+ * pvfs2_inode_getxattr() to probe the length of the value, but
+ * I don't do that for now.
+ */
+ value = kmalloc(PVFS_MAX_XATTR_VALUELEN, GFP_KERNEL);
+ if (value == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ gossip_debug(GOSSIP_ACL_DEBUG,
+ "inode %pU, key %s, type %d\n",
+ get_khandle_from_ino(inode),
+ key,
+ type);
+ ret = pvfs2_inode_getxattr(inode,
+ "",
+ key,
+ value,
+ PVFS_MAX_XATTR_VALUELEN);
+ /* if the key exists, convert it to an in-memory rep */
+ if (ret > 0) {
+ acl = posix_acl_from_xattr(&init_user_ns, value, ret);
+ } else if (ret == -ENODATA || ret == -ENOSYS) {
+ acl = NULL;
+ } else {
+ gossip_err("inode %pU retrieving acl's failed with error %d\n",
+ get_khandle_from_ino(inode),
+ ret);
+ acl = ERR_PTR(ret);
+ }
+ /* kfree(NULL) is safe, so don't worry if value ever got used */
+ kfree(value);
+ return acl;
+}
+
+int pvfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
+{
+ struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
+ int error = 0;
+ void *value = NULL;
+ size_t size = 0;
+ const char *name = NULL;
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ name = PVFS2_XATTR_NAME_ACL_ACCESS;
+ if (acl) {
+ umode_t mode = inode->i_mode;
+ /*
+ * can we represent this with the traditional file
+ * mode permission bits?
+ */
+ error = posix_acl_equiv_mode(acl, &mode);
+ if (error < 0) {
+ gossip_err("%s: posix_acl_equiv_mode err: %d\n",
+ __func__,
+ error);
+ return error;
+ }
+
+ if (inode->i_mode != mode)
+ SetModeFlag(pvfs2_inode);
+ inode->i_mode = mode;
+ mark_inode_dirty_sync(inode);
+ if (error == 0)
+ acl = NULL;
+ }
+ break;
+ case ACL_TYPE_DEFAULT:
+ name = PVFS2_XATTR_NAME_ACL_DEFAULT;
+ break;
+ default:
+ gossip_err("%s: invalid type %d!\n", __func__, type);
+ return -EINVAL;
+ }
+
+ gossip_debug(GOSSIP_ACL_DEBUG,
+ "%s: inode %pU, key %s type %d\n",
+ __func__, get_khandle_from_ino(inode),
+ name,
+ type);
+
+ if (acl) {
+ size = posix_acl_xattr_size(acl->a_count);
+ value = kmalloc(size, GFP_KERNEL);
+ if (!value)
+ return -ENOMEM;
+
+ error = posix_acl_to_xattr(&init_user_ns, acl, value, size);
+ if (error < 0)
+ goto out;
+ }
+
+ gossip_debug(GOSSIP_ACL_DEBUG,
+ "%s: name %s, value %p, size %zd, acl %p\n",
+ __func__, name, value, size, acl);
+ /*
+ * Go ahead and set the extended attribute now. NOTE: Suppose acl
+ * was NULL, then value will be NULL and size will be 0 and that
+ * will xlate to a removexattr. However, we don't want removexattr
+ * complain if attributes does not exist.
+ */
+ error = pvfs2_inode_setxattr(inode, "", name, value, size, 0);
+
+out:
+ kfree(value);
+ if (!error)
+ set_cached_acl(inode, type, acl);
+ return error;
+}
+
+int pvfs2_init_acl(struct inode *inode, struct inode *dir)
+{
+ struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
+ struct posix_acl *default_acl, *acl;
+ umode_t mode = inode->i_mode;
+ int error = 0;
+
+ ClearModeFlag(pvfs2_inode);
+
+ error = posix_acl_create(dir, &mode, &default_acl, &acl);
+ if (error)
+ return error;
+
+ if (default_acl) {
+ error = pvfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
+ posix_acl_release(default_acl);
+ }
+
+ if (acl) {
+ if (!error)
+ error = pvfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
+ posix_acl_release(acl);
+ }
+
+ /* If mode of the inode was changed, then do a forcible ->setattr */
+ if (mode != inode->i_mode) {
+ SetModeFlag(pvfs2_inode);
+ inode->i_mode = mode;
+ pvfs2_flush_inode(inode);
+ }
+
+ return error;
+}
--- /dev/null
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Implementation of dentry (directory cache) functions.
+ */
+
+#include "protocol.h"
+#include "pvfs2-kernel.h"
+
+/* Returns 1 if dentry can still be trusted, else 0. */
+static int pvfs2_revalidate_lookup(struct dentry *dentry)
+{
+ struct dentry *parent_dentry = dget_parent(dentry);
+ struct inode *parent_inode = parent_dentry->d_inode;
+ struct pvfs2_inode_s *parent = PVFS2_I(parent_inode);
+ struct inode *inode = dentry->d_inode;
+ struct pvfs2_kernel_op_s *new_op;
+ int ret = 0;
+ int err = 0;
+
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: attempting lookup.\n", __func__);
+
+ new_op = op_alloc(PVFS2_VFS_OP_LOOKUP);
+ if (!new_op)
+ goto out_put_parent;
+
+ new_op->upcall.req.lookup.sym_follow = PVFS2_LOOKUP_LINK_NO_FOLLOW;
+ new_op->upcall.req.lookup.parent_refn = parent->refn;
+ strncpy(new_op->upcall.req.lookup.d_name,
+ dentry->d_name.name,
+ PVFS2_NAME_LEN);
+
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s:%s:%d interrupt flag [%d]\n",
+ __FILE__,
+ __func__,
+ __LINE__,
+ get_interruptible_flag(parent_inode));
+
+ err = service_operation(new_op, "pvfs2_lookup",
+ get_interruptible_flag(parent_inode));
+ if (err)
+ goto out_drop;
+
+ if (new_op->downcall.status != 0 ||
+ !match_handle(new_op->downcall.resp.lookup.refn.khandle, inode)) {
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s:%s:%d "
+ "lookup failure |%s| or no match |%s|.\n",
+ __FILE__,
+ __func__,
+ __LINE__,
+ new_op->downcall.status ? "true" : "false",
+ match_handle(new_op->downcall.resp.lookup.refn.khandle,
+ inode) ? "false" : "true");
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s:%s:%d revalidate failed\n",
+ __FILE__, __func__, __LINE__);
+ goto out_drop;
+ }
+
+ ret = 1;
+out_release_op:
+ op_release(new_op);
+out_put_parent:
+ dput(parent_dentry);
+ return ret;
+out_drop:
+ d_drop(dentry);
+ goto out_release_op;
+}
+
+/*
+ * Verify that dentry is valid.
+ *
+ * Should return 1 if dentry can still be trusted, else 0
+ */
+static int pvfs2_d_revalidate(struct dentry *dentry, unsigned int flags)
+{
+ struct inode *inode;
+ int ret = 0;
+
+ if (flags & LOOKUP_RCU)
+ return -ECHILD;
+
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: called on dentry %p.\n",
+ __func__, dentry);
+
+ /* find inode from dentry */
+ if (!dentry->d_inode) {
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: negative dentry.\n",
+ __func__);
+ goto invalid_exit;
+ }
+
+ gossip_debug(GOSSIP_DCACHE_DEBUG, "%s: inode valid.\n", __func__);
+ inode = dentry->d_inode;
+
+ /*
+ * first perform a lookup to make sure that the object not only
+ * exists, but is still in the expected place in the name space
+ */
+ if (!is_root_handle(inode)) {
+ if (!pvfs2_revalidate_lookup(dentry))
+ goto invalid_exit;
+ } else {
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s: root handle, lookup skipped.\n",
+ __func__);
+ }
+
+ /* now perform getattr */
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s: doing getattr: inode: %p, handle: %pU\n",
+ __func__,
+ inode,
+ get_khandle_from_ino(inode));
+ ret = pvfs2_inode_getattr(inode, PVFS_ATTR_SYS_ALL_NOHINT);
+ gossip_debug(GOSSIP_DCACHE_DEBUG,
+ "%s: getattr %s (ret = %d), returning %s for dentry i_count=%d\n",
+ __func__,
+ (ret == 0 ? "succeeded" : "failed"),
+ ret,
+ (ret == 0 ? "valid" : "INVALID"),
+ atomic_read(&inode->i_count));
+ if (ret != 0)
+ goto invalid_exit;
+
+ /* dentry is valid! */
+ return 1;
+
+invalid_exit:
+ return 0;
+}
+
+const struct dentry_operations pvfs2_dentry_operations = {
+ .d_revalidate = pvfs2_d_revalidate,
+};
--- /dev/null
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * Changes by Acxiom Corporation to add protocol version to kernel
+ * communication, Copyright Acxiom Corporation, 2005.
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "pvfs2-kernel.h"
+#include "pvfs2-dev-proto.h"
+#include "pvfs2-bufmap.h"
+
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+
+/* this file implements the /dev/pvfs2-req device node */
+
+static int open_access_count;
+
+#define DUMP_DEVICE_ERROR() \
+do { \
+ gossip_err("*****************************************************\n");\
+ gossip_err("PVFS2 Device Error: You cannot open the device file "); \
+ gossip_err("\n/dev/%s more than once. Please make sure that\nthere " \
+ "are no ", PVFS2_REQDEVICE_NAME); \
+ gossip_err("instances of a program using this device\ncurrently " \
+ "running. (You must verify this!)\n"); \
+ gossip_err("For example, you can use the lsof program as follows:\n");\
+ gossip_err("'lsof | grep %s' (run this as root)\n", \
+ PVFS2_REQDEVICE_NAME); \
+ gossip_err(" open_access_count = %d\n", open_access_count); \
+ gossip_err("*****************************************************\n");\
+} while (0)
+
+static int hash_func(__u64 tag, int table_size)
+{
+ return tag % ((unsigned int)table_size);
+}
+
+static void pvfs2_devreq_add_op(struct pvfs2_kernel_op_s *op)
+{
+ int index = hash_func(op->tag, hash_table_size);
+
+ spin_lock(&htable_ops_in_progress_lock);
+ list_add_tail(&op->list, &htable_ops_in_progress[index]);
+ spin_unlock(&htable_ops_in_progress_lock);
+}
+
+static struct pvfs2_kernel_op_s *pvfs2_devreq_remove_op(__u64 tag)
+{
+ struct pvfs2_kernel_op_s *op, *next;
+ int index;
+
+ index = hash_func(tag, hash_table_size);
+
+ spin_lock(&htable_ops_in_progress_lock);
+ list_for_each_entry_safe(op,
+ next,
+ &htable_ops_in_progress[index],
+ list) {
+ if (op->tag == tag) {
+ list_del(&op->list);
+ spin_unlock(&htable_ops_in_progress_lock);
+ return op;
+ }
+ }
+
+ spin_unlock(&htable_ops_in_progress_lock);
+ return NULL;
+}
+
+static int pvfs2_devreq_open(struct inode *inode, struct file *file)
+{
+ int ret = -EINVAL;
+
+ if (!(file->f_flags & O_NONBLOCK)) {
+ gossip_err("pvfs2: device cannot be opened in blocking mode\n");
+ goto out;
+ }
+ ret = -EACCES;
+ gossip_debug(GOSSIP_DEV_DEBUG, "pvfs2-client-core: opening device\n");
+ mutex_lock(&devreq_mutex);
+
+ if (open_access_count == 0) {
+ ret = generic_file_open(inode, file);
+ if (ret == 0)
+ open_access_count++;
+ } else {
+ DUMP_DEVICE_ERROR();
+ }
+ mutex_unlock(&devreq_mutex);
+
+out:
+
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "pvfs2-client-core: open device complete (ret = %d)\n",
+ ret);
+ return ret;
+}
+
+static ssize_t pvfs2_devreq_read(struct file *file,
+ char __user *buf,
+ size_t count, loff_t *offset)
+{
+ int ret = 0;
+ ssize_t len = 0;
+ struct pvfs2_kernel_op_s *cur_op = NULL;
+ static __s32 magic = PVFS2_DEVREQ_MAGIC;
+ __s32 proto_ver = PVFS_KERNEL_PROTO_VERSION;
+
+ if (!(file->f_flags & O_NONBLOCK)) {
+ /* We do not support blocking reads/opens any more */
+ gossip_err("pvfs2: blocking reads are not supported! (pvfs2-client-core bug)\n");
+ return -EINVAL;
+ } else {
+ struct pvfs2_kernel_op_s *op = NULL, *temp = NULL;
+ /* get next op (if any) from top of list */
+ spin_lock(&pvfs2_request_list_lock);
+ list_for_each_entry_safe(op, temp, &pvfs2_request_list, list) {
+ __s32 fsid = fsid_of_op(op);
+ /*
+ * Check if this op's fsid is known and needs
+ * remounting
+ */
+ if (fsid != PVFS_FS_ID_NULL &&
+ fs_mount_pending(fsid) == 1) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "Skipping op tag %llu %s\n",
+ llu(op->tag),
+ get_opname_string(op));
+ continue;
+ } else {
+ /*
+ * op does not belong to any particular fsid
+ * or already mounted.. let it through
+ */
+ cur_op = op;
+ spin_lock(&cur_op->lock);
+ list_del(&cur_op->list);
+ cur_op->op_linger_tmp--;
+ /*
+ * if there is a trailer, re-add it to
+ * the request list.
+ */
+ if (cur_op->op_linger == 2 &&
+ cur_op->op_linger_tmp == 1) {
+ if (cur_op->upcall.trailer_size <= 0 ||
+ cur_op->upcall.trailer_buf == NULL)
+ gossip_err("BUG:trailer_size is %ld and trailer buf is %p\n", (long)cur_op->upcall.trailer_size, cur_op->upcall.trailer_buf);
+ /* re-add it to the head of the list */
+ list_add(&cur_op->list,
+ &pvfs2_request_list);
+ }
+ spin_unlock(&cur_op->lock);
+ break;
+ }
+ }
+ spin_unlock(&pvfs2_request_list_lock);
+ }
+
+ if (cur_op) {
+ spin_lock(&cur_op->lock);
+
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "client-core: reading op tag %llu %s\n",
+ llu(cur_op->tag), get_opname_string(cur_op));
+ if (op_state_in_progress(cur_op) || op_state_serviced(cur_op)) {
+ if (cur_op->op_linger == 1)
+ gossip_err("WARNING: Current op already queued...skipping\n");
+ } else if (cur_op->op_linger == 1 ||
+ (cur_op->op_linger == 2 &&
+ cur_op->op_linger_tmp == 0)) {
+ /*
+ * atomically move the operation to the
+ * htable_ops_in_progress
+ */
+ set_op_state_inprogress(cur_op);
+ pvfs2_devreq_add_op(cur_op);
+ }
+
+ spin_unlock(&cur_op->lock);
+
+ /* 2 cases
+ * a) OPs with no trailers
+ * b) OPs with trailers, Stage 1
+ * Either way push the upcall out
+ */
+ if (cur_op->op_linger == 1 ||
+ (cur_op->op_linger == 2 && cur_op->op_linger_tmp == 1)) {
+ len = MAX_ALIGNED_DEV_REQ_UPSIZE;
+ if ((size_t) len <= count) {
+ ret = copy_to_user(buf,
+ &proto_ver,
+ sizeof(__s32));
+ if (ret == 0) {
+ ret = copy_to_user(buf + sizeof(__s32),
+ &magic,
+ sizeof(__s32));
+ if (ret == 0) {
+ ret = copy_to_user(buf+2 * sizeof(__s32),
+ &cur_op->tag,
+ sizeof(__u64));
+ if (ret == 0) {
+ ret = copy_to_user(
+ buf +
+ 2 *
+ sizeof(__s32) +
+ sizeof(__u64),
+ &cur_op->upcall,
+ sizeof(struct pvfs2_upcall_s));
+ }
+ }
+ }
+
+ if (ret) {
+ gossip_err("Failed to copy data to user space\n");
+ len = -EFAULT;
+ }
+ } else {
+ gossip_err
+ ("Failed to copy data to user space\n");
+ len = -EIO;
+ }
+ }
+ /* Stage 2: Push the trailer out */
+ else if (cur_op->op_linger == 2 && cur_op->op_linger_tmp == 0) {
+ len = cur_op->upcall.trailer_size;
+ if ((size_t) len <= count) {
+ ret = copy_to_user(buf,
+ cur_op->upcall.trailer_buf,
+ len);
+ if (ret) {
+ gossip_err("Failed to copy trailer to user space\n");
+ len = -EFAULT;
+ }
+ } else {
+ gossip_err("Read buffer for trailer is too small (%ld as opposed to %ld)\n",
+ (long)count,
+ (long)len);
+ len = -EIO;
+ }
+ } else {
+ gossip_err("cur_op: %p (op_linger %d), (op_linger_tmp %d), erroneous request list?\n",
+ cur_op,
+ cur_op->op_linger,
+ cur_op->op_linger_tmp);
+ len = 0;
+ }
+ } else if (file->f_flags & O_NONBLOCK) {
+ /*
+ * if in non-blocking mode, return EAGAIN since no requests are
+ * ready yet
+ */
+ len = -EAGAIN;
+ }
+ return len;
+}
+
+/* Function for writev() callers into the device */
+static ssize_t pvfs2_devreq_writev(struct file *file,
+ const struct iovec *iov,
+ size_t count,
+ loff_t *offset)
+{
+ struct pvfs2_kernel_op_s *op = NULL;
+ void *buffer = NULL;
+ void *ptr = NULL;
+ unsigned long i = 0;
+ static int max_downsize = MAX_ALIGNED_DEV_REQ_DOWNSIZE;
+ int ret = 0, num_remaining = max_downsize;
+ int notrailer_count = 4; /* num elements in iovec without trailer */
+ int payload_size = 0;
+ __s32 magic = 0;
+ __s32 proto_ver = 0;
+ __u64 tag = 0;
+ ssize_t total_returned_size = 0;
+
+ /* Either there is a trailer or there isn't */
+ if (count != notrailer_count && count != (notrailer_count + 1)) {
+ gossip_err("Error: Number of iov vectors is (%ld) and notrailer count is %d\n",
+ count,
+ notrailer_count);
+ return -EPROTO;
+ }
+ buffer = dev_req_alloc();
+ if (!buffer)
+ return -ENOMEM;
+ ptr = buffer;
+
+ for (i = 0; i < notrailer_count; i++) {
+ if (iov[i].iov_len > num_remaining) {
+ gossip_err
+ ("writev error: Freeing buffer and returning\n");
+ dev_req_release(buffer);
+ return -EMSGSIZE;
+ }
+ ret = copy_from_user(ptr, iov[i].iov_base, iov[i].iov_len);
+ if (ret) {
+ gossip_err("Failed to copy data from user space\n");
+ dev_req_release(buffer);
+ return -EIO;
+ }
+ num_remaining -= iov[i].iov_len;
+ ptr += iov[i].iov_len;
+ payload_size += iov[i].iov_len;
+ }
+ total_returned_size = payload_size;
+
+ /* these elements are currently 8 byte aligned (8 bytes for (version +
+ * magic) 8 bytes for tag). If you add another element, either
+ * make it 8 bytes big, or use get_unaligned when asigning.
+ */
+ ptr = buffer;
+ proto_ver = *((__s32 *) ptr);
+ ptr += sizeof(__s32);
+
+ magic = *((__s32 *) ptr);
+ ptr += sizeof(__s32);
+
+ tag = *((__u64 *) ptr);
+ ptr += sizeof(__u64);
+
+ if (magic != PVFS2_DEVREQ_MAGIC) {
+ gossip_err("Error: Device magic number does not match.\n");
+ dev_req_release(buffer);
+ return -EPROTO;
+ }
+
+ /*
+ * proto_ver = 20902 for 2.9.2
+ */
+
+ op = pvfs2_devreq_remove_op(tag);
+ if (op) {
+ /* Increase ref count! */
+ get_op(op);
+ /* cut off magic and tag from payload size */
+ payload_size -= (2 * sizeof(__s32) + sizeof(__u64));
+ if (payload_size <= sizeof(struct pvfs2_downcall_s))
+ /* copy the passed in downcall into the op */
+ memcpy(&op->downcall,
+ ptr,
+ sizeof(struct pvfs2_downcall_s));
+ else
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "writev: Ignoring %d bytes\n",
+ payload_size);
+
+ /* Do not allocate needlessly if client-core forgets
+ * to reset trailer size on op errors.
+ */
+ if (op->downcall.status == 0 && op->downcall.trailer_size > 0) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "writev: trailer size %ld\n",
+ (unsigned long)op->downcall.trailer_size);
+ if (count != (notrailer_count + 1)) {
+ gossip_err("Error: trailer size (%ld) is non-zero, no trailer elements though? (%ld)\n", (unsigned long)op->downcall.trailer_size, count);
+ dev_req_release(buffer);
+ put_op(op);
+ return -EPROTO;
+ }
+ if (iov[notrailer_count].iov_len >
+ op->downcall.trailer_size) {
+ gossip_err("writev error: trailer size (%ld) != iov_len (%ld)\n", (unsigned long)op->downcall.trailer_size, (unsigned long)iov[notrailer_count].iov_len);
+ dev_req_release(buffer);
+ put_op(op);
+ return -EMSGSIZE;
+ }
+ /* Allocate a buffer large enough to hold the
+ * trailer bytes.
+ */
+ op->downcall.trailer_buf =
+ vmalloc(op->downcall.trailer_size);
+ if (op->downcall.trailer_buf != NULL) {
+ gossip_debug(GOSSIP_DEV_DEBUG, "vmalloc: %p\n",
+ op->downcall.trailer_buf);
+ ret = copy_from_user(op->downcall.trailer_buf,
+ iov[notrailer_count].
+ iov_base,
+ iov[notrailer_count].
+ iov_len);
+ if (ret) {
+ gossip_err("Failed to copy trailer data from user space\n");
+ dev_req_release(buffer);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "vfree: %p\n",
+ op->downcall.trailer_buf);
+ vfree(op->downcall.trailer_buf);
+ op->downcall.trailer_buf = NULL;
+ put_op(op);
+ return -EIO;
+ }
+ } else {
+ /* Change downcall status */
+ op->downcall.status = -ENOMEM;
+ gossip_err("writev: could not vmalloc for trailer!\n");
+ }
+ }
+
+ /* if this operation is an I/O operation and if it was
+ * initiated on behalf of a *synchronous* VFS I/O operation,
+ * only then we need to wait
+ * for all data to be copied before we can return to avoid
+ * buffer corruption and races that can pull the buffers
+ * out from under us.
+ *
+ * Essentially we're synchronizing with other parts of the
+ * vfs implicitly by not allowing the user space
+ * application reading/writing this device to return until
+ * the buffers are done being used.
+ */
+ if ((op->upcall.type == PVFS2_VFS_OP_FILE_IO &&
+ op->upcall.req.io.async_vfs_io == PVFS_VFS_SYNC_IO) ||
+ op->upcall.type == PVFS2_VFS_OP_FILE_IOX) {
+ int timed_out = 0;
+ DECLARE_WAITQUEUE(wait_entry, current);
+
+ /* tell the vfs op waiting on a waitqueue
+ * that this op is done
+ */
+ spin_lock(&op->lock);
+ set_op_state_serviced(op);
+ spin_unlock(&op->lock);
+
+ add_wait_queue_exclusive(&op->io_completion_waitq,
+ &wait_entry);
+ wake_up_interruptible(&op->waitq);
+
+ while (1) {
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ spin_lock(&op->lock);
+ if (op->io_completed) {
+ spin_unlock(&op->lock);
+ break;
+ }
+ spin_unlock(&op->lock);
+
+ if (!signal_pending(current)) {
+ int timeout =
+ MSECS_TO_JIFFIES(1000 *
+ op_timeout_secs);
+ if (!schedule_timeout(timeout)) {
+ gossip_debug(GOSSIP_DEV_DEBUG, "*** I/O wait time is up\n");
+ timed_out = 1;
+ break;
+ }
+ continue;
+ }
+
+ gossip_debug(GOSSIP_DEV_DEBUG, "*** signal on I/O wait -- aborting\n");
+ break;
+ }
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&op->io_completion_waitq,
+ &wait_entry);
+
+ /* NOTE: for I/O operations we handle releasing the op
+ * object except in the case of timeout. the reason we
+ * can't free the op in timeout cases is that the op
+ * service logic in the vfs retries operations using
+ * the same op ptr, thus it can't be freed.
+ */
+ if (!timed_out)
+ op_release(op);
+ } else {
+
+ /*
+ * tell the vfs op waiting on a waitqueue that
+ * this op is done
+ */
+ spin_lock(&op->lock);
+ set_op_state_serviced(op);
+ spin_unlock(&op->lock);
+ /*
+ for every other operation (i.e. non-I/O), we need to
+ wake up the callers for downcall completion
+ notification
+ */
+ wake_up_interruptible(&op->waitq);
+ }
+ } else {
+ /* ignore downcalls that we're not interested in */
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "WARNING: No one's waiting for tag %llu\n",
+ llu(tag));
+ }
+ dev_req_release(buffer);
+
+ return total_returned_size;
+}
+
+static ssize_t pvfs2_devreq_write_iter(struct kiocb *iocb,
+ struct iov_iter *iter)
+{
+ return pvfs2_devreq_writev(iocb->ki_filp,
+ iter->iov,
+ iter->nr_segs,
+ &iocb->ki_pos);
+}
+
+/* Returns whether any FS are still pending remounted */
+static int mark_all_pending_mounts(void)
+{
+ int unmounted = 1;
+ struct pvfs2_sb_info_s *pvfs2_sb = NULL;
+
+ spin_lock(&pvfs2_superblocks_lock);
+ list_for_each_entry(pvfs2_sb, &pvfs2_superblocks, list) {
+ /* All of these file system require a remount */
+ pvfs2_sb->mount_pending = 1;
+ unmounted = 0;
+ }
+ spin_unlock(&pvfs2_superblocks_lock);
+ return unmounted;
+}
+
+/*
+ * Determine if a given file system needs to be remounted or not
+ * Returns -1 on error
+ * 0 if already mounted
+ * 1 if needs remount
+ */
+int fs_mount_pending(__s32 fsid)
+{
+ int mount_pending = -1;
+ struct pvfs2_sb_info_s *pvfs2_sb = NULL;
+
+ spin_lock(&pvfs2_superblocks_lock);
+ list_for_each_entry(pvfs2_sb, &pvfs2_superblocks, list) {
+ if (pvfs2_sb->fs_id == fsid) {
+ mount_pending = pvfs2_sb->mount_pending;
+ break;
+ }
+ }
+ spin_unlock(&pvfs2_superblocks_lock);
+ return mount_pending;
+}
+
+/*
+ * NOTE: gets called when the last reference to this device is dropped.
+ * Using the open_access_count variable, we enforce a reference count
+ * on this file so that it can be opened by only one process at a time.
+ * the devreq_mutex is used to make sure all i/o has completed
+ * before we call pvfs_bufmap_finalize, and similar such tricky
+ * situations
+ */
+static int pvfs2_devreq_release(struct inode *inode, struct file *file)
+{
+ int unmounted = 0;
+
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "%s:pvfs2-client-core: exiting, closing device\n",
+ __func__);
+
+ mutex_lock(&devreq_mutex);
+ pvfs_bufmap_finalize();
+
+ open_access_count--;
+
+ unmounted = mark_all_pending_mounts();
+ gossip_debug(GOSSIP_DEV_DEBUG, "PVFS2 Device Close: Filesystem(s) %s\n",
+ (unmounted ? "UNMOUNTED" : "MOUNTED"));
+ mutex_unlock(&devreq_mutex);
+
+ /*
+ * Walk through the list of ops in the request list, mark them
+ * as purged and wake them up.
+ */
+ purge_waiting_ops();
+ /*
+ * Walk through the hash table of in progress operations; mark
+ * them as purged and wake them up
+ */
+ purge_inprogress_ops();
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "pvfs2-client-core: device close complete\n");
+ return 0;
+}
+
+int is_daemon_in_service(void)
+{
+ int in_service;
+
+ /*
+ * What this function does is checks if client-core is alive
+ * based on the access count we maintain on the device.
+ */
+ mutex_lock(&devreq_mutex);
+ in_service = open_access_count == 1 ? 0 : -EIO;
+ mutex_unlock(&devreq_mutex);
+ return in_service;
+}
+
+static inline long check_ioctl_command(unsigned int command)
+{
+ /* Check for valid ioctl codes */
+ if (_IOC_TYPE(command) != PVFS_DEV_MAGIC) {
+ gossip_err("device ioctl magic numbers don't match! Did you rebuild pvfs2-client-core/libpvfs2? [cmd %x, magic %x != %x]\n",
+ command,
+ _IOC_TYPE(command),
+ PVFS_DEV_MAGIC);
+ return -EINVAL;
+ }
+ /* and valid ioctl commands */
+ if (_IOC_NR(command) >= PVFS_DEV_MAXNR || _IOC_NR(command) <= 0) {
+ gossip_err("Invalid ioctl command number [%d >= %d]\n",
+ _IOC_NR(command), PVFS_DEV_MAXNR);
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static long dispatch_ioctl_command(unsigned int command, unsigned long arg)
+{
+ static __s32 magic = PVFS2_DEVREQ_MAGIC;
+ static __s32 max_up_size = MAX_ALIGNED_DEV_REQ_UPSIZE;
+ static __s32 max_down_size = MAX_ALIGNED_DEV_REQ_DOWNSIZE;
+ struct PVFS_dev_map_desc user_desc;
+ int ret = 0;
+ struct dev_mask_info_s mask_info = { 0 };
+ struct dev_mask2_info_s mask2_info = { 0, 0 };
+ int upstream_kmod = 1;
+ struct list_head *tmp = NULL;
+ struct pvfs2_sb_info_s *pvfs2_sb = NULL;
+
+ /* mtmoore: add locking here */
+
+ switch (command) {
+ case PVFS_DEV_GET_MAGIC:
+ return ((put_user(magic, (__s32 __user *) arg) == -EFAULT) ?
+ -EIO :
+ 0);
+ case PVFS_DEV_GET_MAX_UPSIZE:
+ return ((put_user(max_up_size,
+ (__s32 __user *) arg) == -EFAULT) ?
+ -EIO :
+ 0);
+ case PVFS_DEV_GET_MAX_DOWNSIZE:
+ return ((put_user(max_down_size,
+ (__s32 __user *) arg) == -EFAULT) ?
+ -EIO :
+ 0);
+ case PVFS_DEV_MAP:
+ ret = copy_from_user(&user_desc,
+ (struct PVFS_dev_map_desc __user *)
+ arg,
+ sizeof(struct PVFS_dev_map_desc));
+ return ret ? -EIO : pvfs_bufmap_initialize(&user_desc);
+ case PVFS_DEV_REMOUNT_ALL:
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "pvfs2_devreq_ioctl: got PVFS_DEV_REMOUNT_ALL\n");
+
+ /*
+ * remount all mounted pvfs2 volumes to regain the lost
+ * dynamic mount tables (if any) -- NOTE: this is done
+ * without keeping the superblock list locked due to the
+ * upcall/downcall waiting. also, the request semaphore is
+ * used to ensure that no operations will be serviced until
+ * all of the remounts are serviced (to avoid ops between
+ * mounts to fail)
+ */
+ ret = mutex_lock_interruptible(&request_mutex);
+ if (ret < 0)
+ return ret;
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "pvfs2_devreq_ioctl: priority remount in progress\n");
+ list_for_each(tmp, &pvfs2_superblocks) {
+ pvfs2_sb =
+ list_entry(tmp, struct pvfs2_sb_info_s, list);
+ if (pvfs2_sb && (pvfs2_sb->sb)) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "Remounting SB %p\n",
+ pvfs2_sb);
+
+ ret = pvfs2_remount(pvfs2_sb->sb);
+ if (ret) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "SB %p remount failed\n",
+ pvfs2_sb);
+ break;
+ }
+ }
+ }
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "pvfs2_devreq_ioctl: priority remount complete\n");
+ mutex_unlock(&request_mutex);
+ return ret;
+
+ case PVFS_DEV_UPSTREAM:
+ ret = copy_to_user((void __user *)arg,
+ &upstream_kmod,
+ sizeof(upstream_kmod));
+
+ if (ret != 0)
+ return -EIO;
+ else
+ return ret;
+
+ case PVFS_DEV_CLIENT_MASK:
+ ret = copy_from_user(&mask2_info,
+ (void __user *)arg,
+ sizeof(struct dev_mask2_info_s));
+
+ if (ret != 0)
+ return -EIO;
+
+ client_debug_mask.mask1 = mask2_info.mask1_value;
+ client_debug_mask.mask2 = mask2_info.mask2_value;
+
+ pr_info("%s: client debug mask has been been received "
+ ":%llx: :%llx:\n",
+ __func__,
+ (unsigned long long)client_debug_mask.mask1,
+ (unsigned long long)client_debug_mask.mask2);
+
+ return ret;
+
+ case PVFS_DEV_CLIENT_STRING:
+ ret = copy_from_user(&client_debug_array_string,
+ (void __user *)arg,
+ PVFS2_MAX_DEBUG_STRING_LEN);
+ if (ret != 0) {
+ pr_info("%s: "
+ "PVFS_DEV_CLIENT_STRING: copy_from_user failed"
+ "\n",
+ __func__);
+ return -EIO;
+ }
+
+ pr_info("%s: client debug array string has been been received."
+ "\n",
+ __func__);
+
+ if (!help_string_initialized) {
+
+ /* Free the "we don't know yet" default string... */
+ kfree(debug_help_string);
+
+ /* build a proper debug help string */
+ if (orangefs_prepare_debugfs_help_string(0)) {
+ gossip_err("%s: "
+ "prepare_debugfs_help_string failed"
+ "\n",
+ __func__);
+ return -EIO;
+ }
+
+ /* Replace the boilerplate boot-time debug-help file. */
+ debugfs_remove(help_file_dentry);
+
+ help_file_dentry =
+ debugfs_create_file(
+ ORANGEFS_KMOD_DEBUG_HELP_FILE,
+ 0444,
+ debug_dir,
+ debug_help_string,
+ &debug_help_fops);
+
+ if (!help_file_dentry) {
+ gossip_err("%s: debugfs_create_file failed for"
+ " :%s:!\n",
+ __func__,
+ ORANGEFS_KMOD_DEBUG_HELP_FILE);
+ return -EIO;
+ }
+ }
+
+ debug_mask_to_string(&client_debug_mask, 1);
+
+ debugfs_remove(client_debug_dentry);
+
+ pvfs2_client_debug_init();
+
+ help_string_initialized++;
+
+ return ret;
+
+ case PVFS_DEV_DEBUG:
+ ret = copy_from_user(&mask_info,
+ (void __user *)arg,
+ sizeof(mask_info));
+
+ if (ret != 0)
+ return -EIO;
+
+ if (mask_info.mask_type == KERNEL_MASK) {
+ if ((mask_info.mask_value == 0)
+ && (kernel_mask_set_mod_init)) {
+ /*
+ * the kernel debug mask was set when the
+ * kernel module was loaded; don't override
+ * it if the client-core was started without
+ * a value for PVFS2_KMODMASK.
+ */
+ return 0;
+ }
+ debug_mask_to_string(&mask_info.mask_value,
+ mask_info.mask_type);
+ gossip_debug_mask = mask_info.mask_value;
+ pr_info("PVFS: kernel debug mask has been modified to "
+ ":%s: :%llx:\n",
+ kernel_debug_string,
+ (unsigned long long)gossip_debug_mask);
+ } else if (mask_info.mask_type == CLIENT_MASK) {
+ debug_mask_to_string(&mask_info.mask_value,
+ mask_info.mask_type);
+ pr_info("PVFS: client debug mask has been modified to"
+ ":%s: :%llx:\n",
+ client_debug_string,
+ llu(mask_info.mask_value));
+ } else {
+ gossip_lerr("Invalid mask type....\n");
+ return -EINVAL;
+ }
+
+ return ret;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return -ENOIOCTLCMD;
+}
+
+static long pvfs2_devreq_ioctl(struct file *file,
+ unsigned int command, unsigned long arg)
+{
+ long ret;
+
+ /* Check for properly constructed commands */
+ ret = check_ioctl_command(command);
+ if (ret < 0)
+ return (int)ret;
+
+ return (int)dispatch_ioctl_command(command, arg);
+}
+
+#ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
+
+/* Compat structure for the PVFS_DEV_MAP ioctl */
+struct PVFS_dev_map_desc32 {
+ compat_uptr_t ptr;
+ __s32 total_size;
+ __s32 size;
+ __s32 count;
+};
+
+static unsigned long translate_dev_map26(unsigned long args, long *error)
+{
+ struct PVFS_dev_map_desc32 __user *p32 = (void __user *)args;
+ /*
+ * Depending on the architecture, allocate some space on the
+ * user-call-stack based on our expected layout.
+ */
+ struct PVFS_dev_map_desc __user *p =
+ compat_alloc_user_space(sizeof(*p));
+ u32 addr;
+
+ *error = 0;
+ /* get the ptr from the 32 bit user-space */
+ if (get_user(addr, &p32->ptr))
+ goto err;
+ /* try to put that into a 64-bit layout */
+ if (put_user(compat_ptr(addr), &p->ptr))
+ goto err;
+ /* copy the remaining fields */
+ if (copy_in_user(&p->total_size, &p32->total_size, sizeof(__s32)))
+ goto err;
+ if (copy_in_user(&p->size, &p32->size, sizeof(__s32)))
+ goto err;
+ if (copy_in_user(&p->count, &p32->count, sizeof(__s32)))
+ goto err;
+ return (unsigned long)p;
+err:
+ *error = -EFAULT;
+ return 0;
+}
+
+/*
+ * 32 bit user-space apps' ioctl handlers when kernel modules
+ * is compiled as a 64 bit one
+ */
+static long pvfs2_devreq_compat_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long args)
+{
+ long ret;
+ unsigned long arg = args;
+
+ /* Check for properly constructed commands */
+ ret = check_ioctl_command(cmd);
+ if (ret < 0)
+ return ret;
+ if (cmd == PVFS_DEV_MAP) {
+ /*
+ * convert the arguments to what we expect internally
+ * in kernel space
+ */
+ arg = translate_dev_map26(args, &ret);
+ if (ret < 0) {
+ gossip_err("Could not translate dev map\n");
+ return ret;
+ }
+ }
+ /* no other ioctl requires translation */
+ return dispatch_ioctl_command(cmd, arg);
+}
+
+static int pvfs2_ioctl32_init(void)
+{
+ return 0;
+}
+
+static void pvfs2_ioctl32_cleanup(void)
+{
+ return;
+}
+
+#endif /* CONFIG_COMPAT is in .config */
+
+/* the assigned character device major number */
+static int pvfs2_dev_major;
+
+/*
+ * Initialize pvfs2 device specific state:
+ * Must be called at module load time only
+ */
+int pvfs2_dev_init(void)
+{
+ int ret;
+
+ /* register the ioctl32 sub-system */
+ ret = pvfs2_ioctl32_init();
+ if (ret < 0)
+ return ret;
+
+ /* register pvfs2-req device */
+ pvfs2_dev_major = register_chrdev(0,
+ PVFS2_REQDEVICE_NAME,
+ &pvfs2_devreq_file_operations);
+ if (pvfs2_dev_major < 0) {
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "Failed to register /dev/%s (error %d)\n",
+ PVFS2_REQDEVICE_NAME, pvfs2_dev_major);
+ pvfs2_ioctl32_cleanup();
+ return pvfs2_dev_major;
+ }
+
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "*** /dev/%s character device registered ***\n",
+ PVFS2_REQDEVICE_NAME);
+ gossip_debug(GOSSIP_DEV_DEBUG, "'mknod /dev/%s c %d 0'.\n",
+ PVFS2_REQDEVICE_NAME, pvfs2_dev_major);
+ return 0;
+}
+
+void pvfs2_dev_cleanup(void)
+{
+ unregister_chrdev(pvfs2_dev_major, PVFS2_REQDEVICE_NAME);
+ gossip_debug(GOSSIP_DEV_DEBUG,
+ "*** /dev/%s character device unregistered ***\n",
+ PVFS2_REQDEVICE_NAME);
+ /* unregister the ioctl32 sub-system */
+ pvfs2_ioctl32_cleanup();
+}
+
+static unsigned int pvfs2_devreq_poll(struct file *file,
+ struct poll_table_struct *poll_table)
+{
+ int poll_revent_mask = 0;
+
+ if (open_access_count == 1) {
+ poll_wait(file, &pvfs2_request_list_waitq, poll_table);
+
+ spin_lock(&pvfs2_request_list_lock);
+ if (!list_empty(&pvfs2_request_list))
+ poll_revent_mask |= POLL_IN;
+ spin_unlock(&pvfs2_request_list_lock);
+ }
+ return poll_revent_mask;
+}
+
+const struct file_operations pvfs2_devreq_file_operations = {
+ .owner = THIS_MODULE,
+ .read = pvfs2_devreq_read,
+ .write_iter = pvfs2_devreq_write_iter,
+ .open = pvfs2_devreq_open,
+ .release = pvfs2_devreq_release,
+ .unlocked_ioctl = pvfs2_devreq_ioctl,
+
+#ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
+ .compat_ioctl = pvfs2_devreq_compat_ioctl,
+#endif
+ .poll = pvfs2_devreq_poll
+};
--- /dev/null
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "pvfs2-kernel.h"
+#include "pvfs2-bufmap.h"
+
+struct readdir_handle_s {
+ int buffer_index;
+ struct pvfs2_readdir_response_s readdir_response;
+ void *dents_buf;
+};
+
+/*
+ * decode routine needed by kmod to make sense of the shared page for readdirs.
+ */
+static long decode_dirents(char *ptr, struct pvfs2_readdir_response_s *readdir)
+{
+ int i;
+ struct pvfs2_readdir_response_s *rd =
+ (struct pvfs2_readdir_response_s *) ptr;
+ char *buf = ptr;
+ char **pptr = &buf;
+
+ readdir->token = rd->token;
+ readdir->pvfs_dirent_outcount = rd->pvfs_dirent_outcount;
+ readdir->dirent_array = kmalloc(readdir->pvfs_dirent_outcount *
+ sizeof(*readdir->dirent_array),
+ GFP_KERNEL);
+ if (readdir->dirent_array == NULL)
+ return -ENOMEM;
+ *pptr += offsetof(struct pvfs2_readdir_response_s, dirent_array);
+ for (i = 0; i < readdir->pvfs_dirent_outcount; i++) {
+ dec_string(pptr, &readdir->dirent_array[i].d_name,
+ &readdir->dirent_array[i].d_length);
+ readdir->dirent_array[i].khandle =
+ *(struct pvfs2_khandle *) *pptr;
+ *pptr += 16;
+ }
+ return (unsigned long)*pptr - (unsigned long)ptr;
+}
+
+static long readdir_handle_ctor(struct readdir_handle_s *rhandle, void *buf,
+ int buffer_index)
+{
+ long ret;
+
+ if (buf == NULL) {
+ gossip_err
+ ("Invalid NULL buffer specified in readdir_handle_ctor\n");
+ return -ENOMEM;
+ }
+ if (buffer_index < 0) {
+ gossip_err
+ ("Invalid buffer index specified in readdir_handle_ctor\n");
+ return -EINVAL;
+ }
+ rhandle->buffer_index = buffer_index;
+ rhandle->dents_buf = buf;
+ ret = decode_dirents(buf, &rhandle->readdir_response);
+ if (ret < 0) {
+ gossip_err("Could not decode readdir from buffer %ld\n", ret);
+ rhandle->buffer_index = -1;
+ gossip_debug(GOSSIP_DIR_DEBUG, "vfree %p\n", buf);
+ vfree(buf);
+ rhandle->dents_buf = NULL;
+ }
+ return ret;
+}
+
+static void readdir_handle_dtor(struct pvfs2_bufmap *bufmap,
+ struct readdir_handle_s *rhandle)
+{
+ if (rhandle == NULL)
+ return;
+
+ /* kfree(NULL) is safe */
+ kfree(rhandle->readdir_response.dirent_array);
+ rhandle->readdir_response.dirent_array = NULL;
+
+ if (rhandle->buffer_index >= 0) {
+ readdir_index_put(bufmap, rhandle->buffer_index);
+ rhandle->buffer_index = -1;
+ }
+ if (rhandle->dents_buf) {
+ gossip_debug(GOSSIP_DIR_DEBUG, "vfree %p\n",
+ rhandle->dents_buf);
+ vfree(rhandle->dents_buf);
+ rhandle->dents_buf = NULL;
+ }
+}
+
+/*
+ * Read directory entries from an instance of an open directory.
+ *
+ * \note This routine was converted for the readdir to iterate change
+ * in "struct file_operations". "converted" mostly amounts to
+ * changing occurrences of "readdir" and "filldir" in the
+ * comments to "iterate" and "dir_emit". Also filldir calls
+ * were changed to dir_emit calls.
+ *
+ * \param dir_emit callback function called for each entry read.
+ *
+ * \retval <0 on error
+ * \retval 0 when directory has been completely traversed
+ * \retval >0 if we don't call dir_emit for all entries
+ *
+ * \note If the dir_emit call-back returns non-zero, then iterate should
+ * assume that it has had enough, and should return as well.
+ */
+static int pvfs2_readdir(struct file *file, struct dir_context *ctx)
+{
+ struct pvfs2_bufmap *bufmap = NULL;
+ int ret = 0;
+ int buffer_index;
+ __u64 *ptoken = file->private_data;
+ __u64 pos = 0;
+ ino_t ino = 0;
+ struct dentry *dentry = file->f_path.dentry;
+ struct pvfs2_kernel_op_s *new_op = NULL;
+ struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(dentry->d_inode);
+ int buffer_full = 0;
+ struct readdir_handle_s rhandle;
+ int i = 0;
+ int len = 0;
+ ino_t current_ino = 0;
+ char *current_entry = NULL;
+ long bytes_decoded;
+
+ gossip_ldebug(GOSSIP_DIR_DEBUG,
+ "%s: ctx->pos:%lld, token = %llu\n",
+ __func__,
+ lld(ctx->pos),
+ llu(*ptoken));
+
+ pos = (__u64) ctx->pos;
+
+ /* are we done? */
+ if (pos == PVFS_READDIR_END) {
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "Skipping to termination path\n");
+ return 0;
+ }
+
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "pvfs2_readdir called on %s (pos=%llu)\n",
+ dentry->d_name.name, llu(pos));
+
+ rhandle.buffer_index = -1;
+ rhandle.dents_buf = NULL;
+ memset(&rhandle.readdir_response, 0, sizeof(rhandle.readdir_response));
+
+ new_op = op_alloc(PVFS2_VFS_OP_READDIR);
+ if (!new_op)
+ return -ENOMEM;
+
+ new_op->uses_shared_memory = 1;
+ new_op->upcall.req.readdir.refn = pvfs2_inode->refn;
+ new_op->upcall.req.readdir.max_dirent_count = MAX_DIRENT_COUNT_READDIR;
+
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "%s: upcall.req.readdir.refn.khandle: %pU\n",
+ __func__,
+ &new_op->upcall.req.readdir.refn.khandle);
+
+ /*
+ * NOTE: the position we send to the readdir upcall is out of
+ * sync with ctx->pos since:
+ * 1. pvfs2 doesn't include the "." and ".." entries that are
+ * added below.
+ * 2. the introduction of distributed directory logic makes token no
+ * longer be related to f_pos and pos. Instead an independent
+ * variable is used inside the function and stored in the
+ * private_data of the file structure.
+ */
+ new_op->upcall.req.readdir.token = *ptoken;
+
+get_new_buffer_index:
+ ret = readdir_index_get(&bufmap, &buffer_index);
+ if (ret < 0) {
+ gossip_lerr("pvfs2_readdir: readdir_index_get() failure (%d)\n",
+ ret);
+ goto out_free_op;
+ }
+ new_op->upcall.req.readdir.buf_index = buffer_index;
+
+ ret = service_operation(new_op,
+ "pvfs2_readdir",
+ get_interruptible_flag(dentry->d_inode));
+
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "Readdir downcall status is %d. ret:%d\n",
+ new_op->downcall.status,
+ ret);
+
+ if (ret == -EAGAIN && op_state_purged(new_op)) {
+ /*
+ * readdir shared memory aread has been wiped due to
+ * pvfs2-client-core restarting, so we must get a new
+ * index into the shared memory.
+ */
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "%s: Getting new buffer_index for retry of readdir..\n",
+ __func__);
+ readdir_index_put(bufmap, buffer_index);
+ goto get_new_buffer_index;
+ }
+
+ if (ret == -EIO && op_state_purged(new_op)) {
+ gossip_err("%s: Client is down. Aborting readdir call.\n",
+ __func__);
+ readdir_index_put(bufmap, buffer_index);
+ goto out_free_op;
+ }
+
+ if (ret < 0 || new_op->downcall.status != 0) {
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "Readdir request failed. Status:%d\n",
+ new_op->downcall.status);
+ readdir_index_put(bufmap, buffer_index);
+ if (ret >= 0)
+ ret = new_op->downcall.status;
+ goto out_free_op;
+ }
+
+ bytes_decoded =
+ readdir_handle_ctor(&rhandle,
+ new_op->downcall.trailer_buf,
+ buffer_index);
+ if (bytes_decoded < 0) {
+ gossip_err("pvfs2_readdir: Could not decode trailer buffer into a readdir response %d\n",
+ ret);
+ ret = bytes_decoded;
+ readdir_index_put(bufmap, buffer_index);
+ goto out_free_op;
+ }
+
+ if (bytes_decoded != new_op->downcall.trailer_size) {
+ gossip_err("pvfs2_readdir: # bytes decoded (%ld) != trailer size (%ld)\n",
+ bytes_decoded,
+ (long)new_op->downcall.trailer_size);
+ ret = -EINVAL;
+ goto out_destroy_handle;
+ }
+
+ if (pos == 0) {
+ ino = get_ino_from_khandle(dentry->d_inode);
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "%s: calling dir_emit of \".\" with pos = %llu\n",
+ __func__,
+ llu(pos));
+ ret = dir_emit(ctx, ".", 1, ino, DT_DIR);
+ if (ret < 0)
+ goto out_destroy_handle;
+ ctx->pos++;
+ gossip_ldebug(GOSSIP_DIR_DEBUG,
+ "%s: ctx->pos:%lld\n",
+ __func__,
+ lld(ctx->pos));
+ pos++;
+ }
+
+ if (pos == 1) {
+ ino = get_parent_ino_from_dentry(dentry);
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "%s: calling dir_emit of \"..\" with pos = %llu\n",
+ __func__,
+ llu(pos));
+ ret = dir_emit(ctx, "..", 2, ino, DT_DIR);
+ if (ret < 0)
+ goto out_destroy_handle;
+ ctx->pos++;
+ gossip_ldebug(GOSSIP_DIR_DEBUG,
+ "%s: ctx->pos:%lld\n",
+ __func__,
+ lld(ctx->pos));
+ pos++;
+ }
+
+ for (i = 0; i < rhandle.readdir_response.pvfs_dirent_outcount; i++) {
+ len = rhandle.readdir_response.dirent_array[i].d_length;
+ current_entry = rhandle.readdir_response.dirent_array[i].d_name;
+ current_ino = pvfs2_khandle_to_ino(
+ &(rhandle.readdir_response.dirent_array[i].khandle));
+
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "calling dir_emit for %s with len %d, pos %ld\n",
+ current_entry,
+ len,
+ (unsigned long)pos);
+ ret =
+ dir_emit(ctx, current_entry, len, current_ino, DT_UNKNOWN);
+ if (ret < 0) {
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "dir_emit() failed. ret:%d\n",
+ ret);
+ if (i < 2) {
+ gossip_err("dir_emit failed on one of the first two true PVFS directory entries.\n");
+ gossip_err("Duplicate entries may appear.\n");
+ }
+ buffer_full = 1;
+ break;
+ }
+ ctx->pos++;
+ gossip_ldebug(GOSSIP_DIR_DEBUG,
+ "%s: ctx->pos:%lld\n",
+ __func__,
+ lld(ctx->pos));
+
+ pos++;
+ }
+
+ /* this means that all of the dir_emit calls succeeded */
+ if (i == rhandle.readdir_response.pvfs_dirent_outcount) {
+ /* update token */
+ *ptoken = rhandle.readdir_response.token;
+ } else {
+ /* this means a dir_emit call failed */
+ if (rhandle.readdir_response.token == PVFS_READDIR_END) {
+ /*
+ * If PVFS hit end of directory, then there
+ * is no way to do math on the token that it
+ * returned. Instead we go by ctx->pos but
+ * back up to account for the artificial .
+ * and .. entries.
+ */
+ ctx->pos -= 3;
+ } else {
+ /*
+ * this means a dir_emit call failed. !!! need to set
+ * back to previous ctx->pos, no middle value allowed
+ */
+ pos -= (i - 1);
+ ctx->pos -= (i - 1);
+ }
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "at least one dir_emit call failed. Setting ctx->pos to: %lld\n",
+ lld(ctx->pos));
+ }
+
+ /*
+ * Did we hit the end of the directory?
+ */
+ if (rhandle.readdir_response.token == PVFS_READDIR_END &&
+ !buffer_full) {
+ gossip_debug(GOSSIP_DIR_DEBUG, "End of dir detected; setting ctx->pos to PVFS_READDIR_END.\n");
+ ctx->pos = PVFS_READDIR_END;
+ }
+
+ gossip_debug(GOSSIP_DIR_DEBUG,
+ "pos = %llu, token = %llu"
+ ", ctx->pos should have been %lld\n",
+ llu(pos),
+ llu(*ptoken),
+ lld(ctx->pos));
+
+out_destroy_handle:
+ readdir_handle_dtor(bufmap, &rhandle);
+out_free_op:
+ op_release(new_op);
+ gossip_debug(GOSSIP_DIR_DEBUG, "pvfs2_readdir returning %d\n", ret);
+ return ret;
+}
+
+static int pvfs2_dir_open(struct inode *inode, struct file *file)
+{
+ __u64 *ptoken;
+
+ file->private_data = kmalloc(sizeof(__u64), GFP_KERNEL);
+ if (!file->private_data)
+ return -ENOMEM;
+
+ ptoken = file->private_data;
+ *ptoken = PVFS_READDIR_START;
+ return 0;
+}
+
+static int pvfs2_dir_release(struct inode *inode, struct file *file)
+{
+ pvfs2_flush_inode(inode);
+ kfree(file->private_data);
+ return 0;
+}
+
+/** PVFS2 implementation of VFS directory operations */
+const struct file_operations pvfs2_dir_operations = {
+ .read = generic_read_dir,
+ .iterate = pvfs2_readdir,
+ .open = pvfs2_dir_open,
+ .release = pvfs2_dir_release,
+};
--- /dev/null
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Linux VFS file operations.
+ */
+
+#include "protocol.h"
+#include "pvfs2-kernel.h"
+#include "pvfs2-bufmap.h"
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+
+#define wake_up_daemon_for_return(op) \
+do { \
+ spin_lock(&op->lock); \
+ op->io_completed = 1; \
+ spin_unlock(&op->lock); \
+ wake_up_interruptible(&op->io_completion_waitq);\
+} while (0)
+
+/*
+ * Copy to client-core's address space from the buffers specified
+ * by the iovec upto total_size bytes.
+ * NOTE: the iovector can either contain addresses which
+ * can futher be kernel-space or user-space addresses.
+ * or it can pointers to struct page's
+ */
+static int precopy_buffers(struct pvfs2_bufmap *bufmap,
+ int buffer_index,
+ const struct iovec *vec,
+ unsigned long nr_segs,
+ size_t total_size,
+ int from_user)
+{
+ int ret = 0;
+
+ /*
+ * copy data from application/kernel by pulling it out
+ * of the iovec.
+ */
+ /* Are we copying from User Virtual Addresses? */
+ if (from_user)
+ ret = pvfs_bufmap_copy_iovec_from_user(
+ bufmap,
+ buffer_index,
+ vec,
+ nr_segs,
+ total_size);
+ /* Are we copying from Kernel Virtual Addresses? */
+ else
+ ret = pvfs_bufmap_copy_iovec_from_kernel(
+ bufmap,
+ buffer_index,
+ vec,
+ nr_segs,
+ total_size);
+ if (ret < 0)
+ gossip_err("%s: Failed to copy-in buffers. Please make sure that the pvfs2-client is running. %ld\n",
+ __func__,
+ (long)ret);
+ return ret;
+}
+
+/*
+ * Copy from client-core's address space to the buffers specified
+ * by the iovec upto total_size bytes.
+ * NOTE: the iovector can either contain addresses which
+ * can futher be kernel-space or user-space addresses.
+ * or it can pointers to struct page's
+ */
+static int postcopy_buffers(struct pvfs2_bufmap *bufmap,
+ int buffer_index,
+ const struct iovec *vec,
+ int nr_segs,
+ size_t total_size,
+ int to_user)
+{
+ int ret = 0;
+
+ /*
+ * copy data to application/kernel by pushing it out to
+ * the iovec. NOTE; target buffers can be addresses or
+ * struct page pointers.
+ */
+ if (total_size) {
+ /* Are we copying to User Virtual Addresses? */
+ if (to_user)
+ ret = pvfs_bufmap_copy_to_user_iovec(
+ bufmap,
+ buffer_index,
+ vec,
+ nr_segs,
+ total_size);
+ /* Are we copying to Kern Virtual Addresses? */
+ else
+ ret = pvfs_bufmap_copy_to_kernel_iovec(
+ bufmap,
+ buffer_index,
+ vec,
+ nr_segs,
+ total_size);
+ if (ret < 0)
+ gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
+ __func__,
+ (long)ret);
+ }
+ return ret;
+}
+
+/*
+ * Post and wait for the I/O upcall to finish
+ */
+static ssize_t wait_for_direct_io(enum PVFS_io_type type, struct inode *inode,
+ loff_t *offset, struct iovec *vec, unsigned long nr_segs,
+ size_t total_size, loff_t readahead_size, int to_user)
+{
+ struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
+ struct pvfs2_khandle *handle = &pvfs2_inode->refn.khandle;
+ struct pvfs2_bufmap *bufmap = NULL;
+ struct pvfs2_kernel_op_s *new_op = NULL;
+ int buffer_index = -1;
+ ssize_t ret;
+
+ new_op = op_alloc(PVFS2_VFS_OP_FILE_IO);
+ if (!new_op) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ /* synchronous I/O */
+ new_op->upcall.req.io.async_vfs_io = PVFS_VFS_SYNC_IO;
+ new_op->upcall.req.io.readahead_size = readahead_size;
+ new_op->upcall.req.io.io_type = type;
+ new_op->upcall.req.io.refn = pvfs2_inode->refn;
+
+populate_shared_memory:
+ /* get a shared buffer index */
+ ret = pvfs_bufmap_get(&bufmap, &buffer_index);
+ if (ret < 0) {
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: pvfs_bufmap_get failure (%ld)\n",
+ __func__, (long)ret);
+ goto out;
+ }
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): GET op %p -> buffer_index %d\n",
+ __func__,
+ handle,
+ new_op,
+ buffer_index);
+
+ new_op->uses_shared_memory = 1;
+ new_op->upcall.req.io.buf_index = buffer_index;
+ new_op->upcall.req.io.count = total_size;
+ new_op->upcall.req.io.offset = *offset;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): copy_to_user %d nr_segs %lu, offset: %llu total_size: %zd\n",
+ __func__,
+ handle,
+ to_user,
+ nr_segs,
+ llu(*offset),
+ total_size);
+ /*
+ * Stage 1: copy the buffers into client-core's address space
+ * precopy_buffers only pertains to writes.
+ */
+ if (type == PVFS_IO_WRITE) {
+ ret = precopy_buffers(bufmap,
+ buffer_index,
+ vec,
+ nr_segs,
+ total_size,
+ to_user);
+ if (ret < 0)
+ goto out;
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): Calling post_io_request with tag (%llu)\n",
+ __func__,
+ handle,
+ llu(new_op->tag));
+
+ /* Stage 2: Service the I/O operation */
+ ret = service_operation(new_op,
+ type == PVFS_IO_WRITE ?
+ "file_write" :
+ "file_read",
+ get_interruptible_flag(inode));
+
+ /*
+ * If service_operation() returns -EAGAIN #and# the operation was
+ * purged from pvfs2_request_list or htable_ops_in_progress, then
+ * we know that the client was restarted, causing the shared memory
+ * area to be wiped clean. To restart a write operation in this
+ * case, we must re-copy the data from the user's iovec to a NEW
+ * shared memory location. To restart a read operation, we must get
+ * a new shared memory location.
+ */
+ if (ret == -EAGAIN && op_state_purged(new_op)) {
+ pvfs_bufmap_put(bufmap, buffer_index);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s:going to repopulate_shared_memory.\n",
+ __func__);
+ goto populate_shared_memory;
+ }
+
+ if (ret < 0) {
+ handle_io_error(); /* defined in pvfs2-kernel.h */
+ /*
+ don't write an error to syslog on signaled operation
+ termination unless we've got debugging turned on, as
+ this can happen regularly (i.e. ctrl-c)
+ */
+ if (ret == -EINTR)
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: returning error %ld\n", __func__,
+ (long)ret);
+ else
+ gossip_err("%s: error in %s handle %pU, returning %zd\n",
+ __func__,
+ type == PVFS_IO_READ ?
+ "read from" : "write to",
+ handle, ret);
+ goto out;
+ }
+
+ /*
+ * Stage 3: Post copy buffers from client-core's address space
+ * postcopy_buffers only pertains to reads.
+ */
+ if (type == PVFS_IO_READ) {
+ ret = postcopy_buffers(bufmap,
+ buffer_index,
+ vec,
+ nr_segs,
+ new_op->downcall.resp.io.amt_complete,
+ to_user);
+ if (ret < 0) {
+ /*
+ * put error codes in downcall so that handle_io_error()
+ * preserves it properly
+ */
+ new_op->downcall.status = ret;
+ handle_io_error();
+ goto out;
+ }
+ }
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): Amount written as returned by the sys-io call:%d\n",
+ __func__,
+ handle,
+ (int)new_op->downcall.resp.io.amt_complete);
+
+ ret = new_op->downcall.resp.io.amt_complete;
+
+ /*
+ tell the device file owner waiting on I/O that this read has
+ completed and it can return now. in this exact case, on
+ wakeup the daemon will free the op, so we *cannot* touch it
+ after this.
+ */
+ wake_up_daemon_for_return(new_op);
+ new_op = NULL;
+
+out:
+ if (buffer_index >= 0) {
+ pvfs_bufmap_put(bufmap, buffer_index);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): PUT buffer_index %d\n",
+ __func__, handle, buffer_index);
+ buffer_index = -1;
+ }
+ if (new_op) {
+ op_release(new_op);
+ new_op = NULL;
+ }
+ return ret;
+}
+
+/*
+ * The reason we need to do this is to be able to support readv and writev
+ * that are larger than (pvfs_bufmap_size_query()) Default is
+ * PVFS2_BUFMAP_DEFAULT_DESC_SIZE MB. What that means is that we will
+ * create a new io vec descriptor for those memory addresses that
+ * go beyond the limit. Return value for this routine is negative in case
+ * of errors and 0 in case of success.
+ *
+ * Further, the new_nr_segs pointer is updated to hold the new value
+ * of number of iovecs, the new_vec pointer is updated to hold the pointer
+ * to the new split iovec, and the size array is an array of integers holding
+ * the number of iovecs that straddle pvfs_bufmap_size_query().
+ * The max_new_nr_segs value is computed by the caller and returned.
+ * (It will be (count of all iov_len/ block_size) + 1).
+ */
+static int split_iovecs(unsigned long max_new_nr_segs, /* IN */
+ unsigned long nr_segs, /* IN */
+ const struct iovec *original_iovec, /* IN */
+ unsigned long *new_nr_segs, /* OUT */
+ struct iovec **new_vec, /* OUT */
+ unsigned long *seg_count, /* OUT */
+ unsigned long **seg_array) /* OUT */
+{
+ unsigned long seg;
+ unsigned long count = 0;
+ unsigned long begin_seg;
+ unsigned long tmpnew_nr_segs = 0;
+ struct iovec *new_iovec = NULL;
+ struct iovec *orig_iovec;
+ unsigned long *sizes = NULL;
+ unsigned long sizes_count = 0;
+
+ if (nr_segs <= 0 ||
+ original_iovec == NULL ||
+ new_nr_segs == NULL ||
+ new_vec == NULL ||
+ seg_count == NULL ||
+ seg_array == NULL ||
+ max_new_nr_segs <= 0) {
+ gossip_err("Invalid parameters to split_iovecs\n");
+ return -EINVAL;
+ }
+ *new_nr_segs = 0;
+ *new_vec = NULL;
+ *seg_count = 0;
+ *seg_array = NULL;
+ /* copy the passed in iovec descriptor to a temp structure */
+ orig_iovec = kmalloc_array(nr_segs,
+ sizeof(*orig_iovec),
+ PVFS2_BUFMAP_GFP_FLAGS);
+ if (orig_iovec == NULL) {
+ gossip_err(
+ "split_iovecs: Could not allocate memory for %lu bytes!\n",
+ (unsigned long)(nr_segs * sizeof(*orig_iovec)));
+ return -ENOMEM;
+ }
+ new_iovec = kcalloc(max_new_nr_segs,
+ sizeof(*new_iovec),
+ PVFS2_BUFMAP_GFP_FLAGS);
+ if (new_iovec == NULL) {
+ kfree(orig_iovec);
+ gossip_err(
+ "split_iovecs: Could not allocate memory for %lu bytes!\n",
+ (unsigned long)(max_new_nr_segs * sizeof(*new_iovec)));
+ return -ENOMEM;
+ }
+ sizes = kcalloc(max_new_nr_segs,
+ sizeof(*sizes),
+ PVFS2_BUFMAP_GFP_FLAGS);
+ if (sizes == NULL) {
+ kfree(new_iovec);
+ kfree(orig_iovec);
+ gossip_err(
+ "split_iovecs: Could not allocate memory for %lu bytes!\n",
+ (unsigned long)(max_new_nr_segs * sizeof(*sizes)));
+ return -ENOMEM;
+ }
+ /* copy the passed in iovec to a temp structure */
+ memcpy(orig_iovec, original_iovec, nr_segs * sizeof(*orig_iovec));
+ begin_seg = 0;
+repeat:
+ for (seg = begin_seg; seg < nr_segs; seg++) {
+ if (tmpnew_nr_segs >= max_new_nr_segs ||
+ sizes_count >= max_new_nr_segs) {
+ kfree(sizes);
+ kfree(orig_iovec);
+ kfree(new_iovec);
+ gossip_err
+ ("split_iovecs: exceeded the index limit (%lu)\n",
+ tmpnew_nr_segs);
+ return -EINVAL;
+ }
+ if (count + orig_iovec[seg].iov_len <
+ pvfs_bufmap_size_query()) {
+ count += orig_iovec[seg].iov_len;
+ memcpy(&new_iovec[tmpnew_nr_segs],
+ &orig_iovec[seg],
+ sizeof(*new_iovec));
+ tmpnew_nr_segs++;
+ sizes[sizes_count]++;
+ } else {
+ new_iovec[tmpnew_nr_segs].iov_base =
+ orig_iovec[seg].iov_base;
+ new_iovec[tmpnew_nr_segs].iov_len =
+ (pvfs_bufmap_size_query() - count);
+ tmpnew_nr_segs++;
+ sizes[sizes_count]++;
+ sizes_count++;
+ begin_seg = seg;
+ orig_iovec[seg].iov_base +=
+ (pvfs_bufmap_size_query() - count);
+ orig_iovec[seg].iov_len -=
+ (pvfs_bufmap_size_query() - count);
+ count = 0;
+ break;
+ }
+ }
+ if (seg != nr_segs)
+ goto repeat;
+ else
+ sizes_count++;
+
+ *new_nr_segs = tmpnew_nr_segs;
+ /* new_iovec is freed by the caller */
+ *new_vec = new_iovec;
+ *seg_count = sizes_count;
+ /* seg_array is also freed by the caller */
+ *seg_array = sizes;
+ kfree(orig_iovec);
+ return 0;
+}
+
+static long bound_max_iovecs(const struct iovec *curr, unsigned long nr_segs,
+ ssize_t *total_count)
+{
+ unsigned long i;
+ long max_nr_iovecs;
+ ssize_t total;
+ ssize_t count;
+
+ total = 0;
+ count = 0;
+ max_nr_iovecs = 0;
+ for (i = 0; i < nr_segs; i++) {
+ const struct iovec *iv = &curr[i];
+
+ count += iv->iov_len;
+ if (unlikely((ssize_t) (count | iv->iov_len) < 0))
+ return -EINVAL;
+ if (total + iv->iov_len < pvfs_bufmap_size_query()) {
+ total += iv->iov_len;
+ max_nr_iovecs++;
+ } else {
+ total =
+ (total + iv->iov_len - pvfs_bufmap_size_query());
+ max_nr_iovecs += (total / pvfs_bufmap_size_query() + 2);
+ }
+ }
+ *total_count = count;
+ return max_nr_iovecs;
+}
+
+/*
+ * Common entry point for read/write/readv/writev
+ * This function will dispatch it to either the direct I/O
+ * or buffered I/O path depending on the mount options and/or
+ * augmented/extended metadata attached to the file.
+ * Note: File extended attributes override any mount options.
+ */
+static ssize_t do_readv_writev(enum PVFS_io_type type, struct file *file,
+ loff_t *offset, const struct iovec *iov, unsigned long nr_segs)
+{
+ struct inode *inode = file->f_mapping->host;
+ struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
+ struct pvfs2_khandle *handle = &pvfs2_inode->refn.khandle;
+ ssize_t ret;
+ ssize_t total_count;
+ unsigned int to_free;
+ size_t count;
+ unsigned long seg;
+ unsigned long new_nr_segs = 0;
+ unsigned long max_new_nr_segs = 0;
+ unsigned long seg_count = 0;
+ unsigned long *seg_array = NULL;
+ struct iovec *iovecptr = NULL;
+ struct iovec *ptr = NULL;
+
+ total_count = 0;
+ ret = -EINVAL;
+ count = 0;
+ to_free = 0;
+
+ /* Compute total and max number of segments after split */
+ max_new_nr_segs = bound_max_iovecs(iov, nr_segs, &count);
+ if (max_new_nr_segs < 0) {
+ gossip_lerr("%s: could not bound iovec %lu\n",
+ __func__,
+ max_new_nr_segs);
+ goto out;
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
+ __func__,
+ handle,
+ (int)count);
+
+ if (type == PVFS_IO_WRITE) {
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): proceeding with offset : %llu, "
+ "size %d\n",
+ __func__,
+ handle,
+ llu(*offset),
+ (int)count);
+ }
+
+ if (count == 0) {
+ ret = 0;
+ goto out;
+ }
+
+ /*
+ * if the total size of data transfer requested is greater than
+ * the kernel-set blocksize of PVFS2, then we split the iovecs
+ * such that no iovec description straddles a block size limit
+ */
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: pvfs_bufmap_size:%d\n",
+ __func__,
+ pvfs_bufmap_size_query());
+
+ if (count > pvfs_bufmap_size_query()) {
+ /*
+ * Split up the given iovec description such that
+ * no iovec descriptor straddles over the block-size limitation.
+ * This makes us our job easier to stage the I/O.
+ * In addition, this function will also compute an array
+ * with seg_count entries that will store the number of
+ * segments that straddle the block-size boundaries.
+ */
+ ret = split_iovecs(max_new_nr_segs, /* IN */
+ nr_segs, /* IN */
+ iov, /* IN */
+ &new_nr_segs, /* OUT */
+ &iovecptr, /* OUT */
+ &seg_count, /* OUT */
+ &seg_array); /* OUT */
+ if (ret < 0) {
+ gossip_err("%s: Failed to split iovecs to satisfy larger than blocksize readv/writev request %zd\n",
+ __func__,
+ ret);
+ goto out;
+ }
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: Splitting iovecs from %lu to %lu"
+ " [max_new %lu]\n",
+ __func__,
+ nr_segs,
+ new_nr_segs,
+ max_new_nr_segs);
+ /* We must free seg_array and iovecptr */
+ to_free = 1;
+ } else {
+ new_nr_segs = nr_segs;
+ /* use the given iovec description */
+ iovecptr = (struct iovec *)iov;
+ /* There is only 1 element in the seg_array */
+ seg_count = 1;
+ /* and its value is the number of segments passed in */
+ seg_array = &nr_segs;
+ /* We dont have to free up anything */
+ to_free = 0;
+ }
+ ptr = iovecptr;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU) %zd@%llu\n",
+ __func__,
+ handle,
+ count,
+ llu(*offset));
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): new_nr_segs: %lu, seg_count: %lu\n",
+ __func__,
+ handle,
+ new_nr_segs, seg_count);
+
+/* PVFS2_KERNEL_DEBUG is a CFLAGS define. */
+#ifdef PVFS2_KERNEL_DEBUG
+ for (seg = 0; seg < new_nr_segs; seg++)
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: %d) %p to %p [%d bytes]\n",
+ __func__,
+ (int)seg + 1,
+ iovecptr[seg].iov_base,
+ iovecptr[seg].iov_base + iovecptr[seg].iov_len,
+ (int)iovecptr[seg].iov_len);
+ for (seg = 0; seg < seg_count; seg++)
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: %zd) %lu\n",
+ __func__,
+ seg + 1,
+ seg_array[seg]);
+#endif
+ seg = 0;
+ while (total_count < count) {
+ size_t each_count;
+ size_t amt_complete;
+
+ /* how much to transfer in this loop iteration */
+ each_count =
+ (((count - total_count) > pvfs_bufmap_size_query()) ?
+ pvfs_bufmap_size_query() :
+ (count - total_count));
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): size of each_count(%d)\n",
+ __func__,
+ handle,
+ (int)each_count);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): BEFORE wait_for_io: offset is %d\n",
+ __func__,
+ handle,
+ (int)*offset);
+
+ ret = wait_for_direct_io(type, inode, offset, ptr,
+ seg_array[seg], each_count, 0, 1);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): return from wait_for_io:%d\n",
+ __func__,
+ handle,
+ (int)ret);
+
+ if (ret < 0)
+ goto out;
+
+ /* advance the iovec pointer */
+ ptr += seg_array[seg];
+ seg++;
+ *offset += ret;
+ total_count += ret;
+ amt_complete = ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): AFTER wait_for_io: offset is %d\n",
+ __func__,
+ handle,
+ (int)*offset);
+
+ /*
+ * if we got a short I/O operations,
+ * fall out and return what we got so far
+ */
+ if (amt_complete < each_count)
+ break;
+ } /*end while */
+
+ if (total_count > 0)
+ ret = total_count;
+out:
+ if (to_free) {
+ kfree(iovecptr);
+ kfree(seg_array);
+ }
+ if (ret > 0) {
+ if (type == PVFS_IO_READ) {
+ file_accessed(file);
+ } else {
+ SetMtimeFlag(pvfs2_inode);
+ inode->i_mtime = CURRENT_TIME;
+ mark_inode_dirty_sync(inode);
+ }
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): Value(%d) returned.\n",
+ __func__,
+ handle,
+ (int)ret);
+
+ return ret;
+}
+
+/*
+ * Read data from a specified offset in a file (referenced by inode).
+ * Data may be placed either in a user or kernel buffer.
+ */
+ssize_t pvfs2_inode_read(struct inode *inode,
+ char __user *buf,
+ size_t count,
+ loff_t *offset,
+ loff_t readahead_size)
+{
+ struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
+ size_t bufmap_size;
+ struct iovec vec;
+ ssize_t ret = -EINVAL;
+
+ g_pvfs2_stats.reads++;
+
+ vec.iov_base = buf;
+ vec.iov_len = count;
+
+ bufmap_size = pvfs_bufmap_size_query();
+ if (count > bufmap_size) {
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: count is too large (%zd/%zd)!\n",
+ __func__, count, bufmap_size);
+ return -EINVAL;
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU) %zd@%llu\n",
+ __func__,
+ &pvfs2_inode->refn.khandle,
+ count,
+ llu(*offset));
+
+ ret = wait_for_direct_io(PVFS_IO_READ, inode, offset, &vec, 1,
+ count, readahead_size, 0);
+ if (ret > 0)
+ *offset += ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): Value(%zd) returned.\n",
+ __func__,
+ &pvfs2_inode->refn.khandle,
+ ret);
+
+ return ret;
+}
+
+static ssize_t pvfs2_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+ struct file *file = iocb->ki_filp;
+ loff_t pos = *(&iocb->ki_pos);
+ ssize_t rc = 0;
+ unsigned long nr_segs = iter->nr_segs;
+
+ BUG_ON(iocb->private);
+
+ gossip_debug(GOSSIP_FILE_DEBUG, "pvfs2_file_read_iter\n");
+
+ g_pvfs2_stats.reads++;
+
+ rc = do_readv_writev(PVFS_IO_READ,
+ file,
+ &pos,
+ iter->iov,
+ nr_segs);
+ iocb->ki_pos = pos;
+
+ return rc;
+}
+
+static ssize_t pvfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+ struct file *file = iocb->ki_filp;
+ loff_t pos = *(&iocb->ki_pos);
+ unsigned long nr_segs = iter->nr_segs;
+ ssize_t rc;
+
+ BUG_ON(iocb->private);
+
+ gossip_debug(GOSSIP_FILE_DEBUG, "pvfs2_file_write_iter\n");
+
+ mutex_lock(&file->f_mapping->host->i_mutex);
+
+ /* Make sure generic_write_checks sees an up to date inode size. */
+ if (file->f_flags & O_APPEND) {
+ rc = pvfs2_inode_getattr(file->f_mapping->host,
+ PVFS_ATTR_SYS_SIZE);
+ if (rc) {
+ gossip_err("%s: pvfs2_inode_getattr failed, rc:%zd:.\n",
+ __func__, rc);
+ goto out;
+ }
+ }
+
+ if (file->f_pos > i_size_read(file->f_mapping->host))
+ pvfs2_i_size_write(file->f_mapping->host, file->f_pos);
+
+ rc = generic_write_checks(iocb, iter);
+
+ if (rc <= 0) {
+ gossip_err("%s: generic_write_checks failed, rc:%zd:.\n",
+ __func__, rc);
+ goto out;
+ }
+
+ rc = do_readv_writev(PVFS_IO_WRITE,
+ file,
+ &pos,
+ iter->iov,
+ nr_segs);
+ if (rc < 0) {
+ gossip_err("%s: do_readv_writev failed, rc:%zd:.\n",
+ __func__, rc);
+ goto out;
+ }
+
+ iocb->ki_pos = pos;
+ g_pvfs2_stats.writes++;
+
+out:
+
+ mutex_unlock(&file->f_mapping->host->i_mutex);
+ return rc;
+}
+
+/*
+ * Perform a miscellaneous operation on a file.
+ */
+long pvfs2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int ret = -ENOTTY;
+ __u64 val = 0;
+ unsigned long uval;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "pvfs2_ioctl: called with cmd %d\n",
+ cmd);
+
+ /*
+ * we understand some general ioctls on files, such as the immutable
+ * and append flags
+ */
+ if (cmd == FS_IOC_GETFLAGS) {
+ val = 0;
+ ret = pvfs2_xattr_get_default(file->f_path.dentry,
+ "user.pvfs2.meta_hint",
+ &val,
+ sizeof(val),
+ 0);
+ if (ret < 0 && ret != -ENODATA)
+ return ret;
+ else if (ret == -ENODATA)
+ val = 0;
+ uval = val;
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "pvfs2_ioctl: FS_IOC_GETFLAGS: %llu\n",
+ (unsigned long long)uval);
+ return put_user(uval, (int __user *)arg);
+ } else if (cmd == FS_IOC_SETFLAGS) {
+ ret = 0;
+ if (get_user(uval, (int __user *)arg))
+ return -EFAULT;
+ /*
+ * PVFS_MIRROR_FL is set internally when the mirroring mode
+ * is turned on for a file. The user is not allowed to turn
+ * on this bit, but the bit is present if the user first gets
+ * the flags and then updates the flags with some new
+ * settings. So, we ignore it in the following edit. bligon.
+ */
+ if ((uval & ~PVFS_MIRROR_FL) &
+ (~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL))) {
+ gossip_err("pvfs2_ioctl: the FS_IOC_SETFLAGS only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n");
+ return -EINVAL;
+ }
+ val = uval;
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "pvfs2_ioctl: FS_IOC_SETFLAGS: %llu\n",
+ (unsigned long long)val);
+ ret = pvfs2_xattr_set_default(file->f_path.dentry,
+ "user.pvfs2.meta_hint",
+ &val,
+ sizeof(val),
+ 0,
+ 0);
+ }
+
+ return ret;
+}
+
+/*
+ * Memory map a region of a file.
+ */
+static int pvfs2_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "pvfs2_file_mmap: called on %s\n",
+ (file ?
+ (char *)file->f_path.dentry->d_name.name :
+ (char *)"Unknown"));
+
+ /* set the sequential readahead hint */
+ vma->vm_flags |= VM_SEQ_READ;
+ vma->vm_flags &= ~VM_RAND_READ;
+ return generic_file_mmap(file, vma);
+}
+
+#define mapping_nrpages(idata) ((idata)->nrpages)
+
+/*
+ * Called to notify the module that there are no more references to
+ * this file (i.e. no processes have it open).
+ *
+ * \note Not called when each file is closed.
+ */
+int pvfs2_file_release(struct inode *inode, struct file *file)
+{
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "pvfs2_file_release: called on %s\n",
+ file->f_path.dentry->d_name.name);
+
+ pvfs2_flush_inode(inode);
+
+ /*
+ remove all associated inode pages from the page cache and mmap
+ readahead cache (if any); this forces an expensive refresh of
+ data for the next caller of mmap (or 'get_block' accesses)
+ */
+ if (file->f_path.dentry->d_inode &&
+ file->f_path.dentry->d_inode->i_mapping &&
+ mapping_nrpages(&file->f_path.dentry->d_inode->i_data))
+ truncate_inode_pages(file->f_path.dentry->d_inode->i_mapping,
+ 0);
+ return 0;
+}
+
+/*
+ * Push all data for a specific file onto permanent storage.
+ */
+int pvfs2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+ int ret = -EINVAL;
+ struct pvfs2_inode_s *pvfs2_inode =
+ PVFS2_I(file->f_path.dentry->d_inode);
+ struct pvfs2_kernel_op_s *new_op = NULL;
+
+ /* required call */
+ filemap_write_and_wait_range(file->f_mapping, start, end);
+
+ new_op = op_alloc(PVFS2_VFS_OP_FSYNC);
+ if (!new_op)
+ return -ENOMEM;
+ new_op->upcall.req.fsync.refn = pvfs2_inode->refn;
+
+ ret = service_operation(new_op,
+ "pvfs2_fsync",
+ get_interruptible_flag(file->f_path.dentry->d_inode));
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "pvfs2_fsync got return value of %d\n",
+ ret);
+
+ op_release(new_op);
+
+ pvfs2_flush_inode(file->f_path.dentry->d_inode);
+ return ret;
+}
+
+/*
+ * Change the file pointer position for an instance of an open file.
+ *
+ * \note If .llseek is overriden, we must acquire lock as described in
+ * Documentation/filesystems/Locking.
+ *
+ * Future upgrade could support SEEK_DATA and SEEK_HOLE but would
+ * require much changes to the FS
+ */
+loff_t pvfs2_file_llseek(struct file *file, loff_t offset, int origin)
+{
+ int ret = -EINVAL;
+ struct inode *inode = file->f_path.dentry->d_inode;
+
+ if (!inode) {
+ gossip_err("pvfs2_file_llseek: invalid inode (NULL)\n");
+ return ret;
+ }
+
+ if (origin == PVFS2_SEEK_END) {
+ /*
+ * revalidate the inode's file size.
+ * NOTE: We are only interested in file size here,
+ * so we set mask accordingly.
+ */
+ ret = pvfs2_inode_getattr(inode, PVFS_ATTR_SYS_SIZE);
+ if (ret) {
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s:%s:%d calling make bad inode\n",
+ __FILE__,
+ __func__,
+ __LINE__);
+ pvfs2_make_bad_inode(inode);
+ return ret;
+ }
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "pvfs2_file_llseek: offset is %ld | origin is %d | "
+ "inode size is %lu\n",
+ (long)offset,
+ origin,
+ (unsigned long)file->f_path.dentry->d_inode->i_size);
+
+ return generic_file_llseek(file, offset, origin);
+}
+
+/*
+ * Support local locks (locks that only this kernel knows about)
+ * if Orangefs was mounted -o local_lock.
+ */
+int pvfs2_lock(struct file *filp, int cmd, struct file_lock *fl)
+{
+ int rc = -ENOLCK;
+
+ if (PVFS2_SB(filp->f_inode->i_sb)->flags & PVFS2_OPT_LOCAL_LOCK) {
+ if (cmd == F_GETLK) {
+ rc = 0;
+ posix_test_lock(filp, fl);
+ } else {
+ rc = posix_lock_file(filp, fl, NULL);
+ }
+ }
+
+ return rc;
+}
+
+/** PVFS2 implementation of VFS file operations */
+const struct file_operations pvfs2_file_operations = {
+ .llseek = pvfs2_file_llseek,
+ .read_iter = pvfs2_file_read_iter,
+ .write_iter = pvfs2_file_write_iter,
+ .lock = pvfs2_lock,
+ .unlocked_ioctl = pvfs2_ioctl,
+ .mmap = pvfs2_file_mmap,
+ .open = generic_file_open,
+ .release = pvfs2_file_release,
+ .fsync = pvfs2_fsync,
+};
--- /dev/null
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Linux VFS inode operations.
+ */
+
+#include "protocol.h"
+#include "pvfs2-kernel.h"
+#include "pvfs2-bufmap.h"
+
+static int read_one_page(struct page *page)
+{
+ void *page_data;
+ int ret;
+ int max_block;
+ ssize_t bytes_read = 0;
+ struct inode *inode = page->mapping->host;
+ const __u32 blocksize = PAGE_CACHE_SIZE; /* inode->i_blksize */
+ const __u32 blockbits = PAGE_CACHE_SHIFT; /* inode->i_blkbits */
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2_readpage called with page %p\n",
+ page);
+ page_data = pvfs2_kmap(page);
+
+ max_block = ((inode->i_size / blocksize) + 1);
+
+ if (page->index < max_block) {
+ loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
+
+ bytes_read = pvfs2_inode_read(inode,
+ page_data,
+ blocksize,
+ &blockptr_offset,
+ inode->i_size);
+ }
+ /* only zero remaining unread portions of the page data */
+ if (bytes_read > 0)
+ memset(page_data + bytes_read, 0, blocksize - bytes_read);
+ else
+ memset(page_data, 0, blocksize);
+ /* takes care of potential aliasing */
+ flush_dcache_page(page);
+ if (bytes_read < 0) {
+ ret = bytes_read;
+ SetPageError(page);
+ } else {
+ SetPageUptodate(page);
+ if (PageError(page))
+ ClearPageError(page);
+ ret = 0;
+ }
+ pvfs2_kunmap(page);
+ /* unlock the page after the ->readpage() routine completes */
+ unlock_page(page);
+ return ret;
+}
+
+static int pvfs2_readpage(struct file *file, struct page *page)
+{
+ return read_one_page(page);
+}
+
+static int pvfs2_readpages(struct file *file,
+ struct address_space *mapping,
+ struct list_head *pages,
+ unsigned nr_pages)
+{
+ int page_idx;
+ int ret;
+
+ gossip_debug(GOSSIP_INODE_DEBUG, "pvfs2_readpages called\n");
+
+ for (page_idx = 0; page_idx < nr_pages; page_idx++) {
+ struct page *page;
+
+ page = list_entry(pages->prev, struct page, lru);
+ list_del(&page->lru);
+ if (!add_to_page_cache(page,
+ mapping,
+ page->index,
+ GFP_KERNEL)) {
+ ret = read_one_page(page);
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "failure adding page to cache, read_one_page returned: %d\n",
+ ret);
+ } else {
+ page_cache_release(page);
+ }
+ }
+ BUG_ON(!list_empty(pages));
+ return 0;
+}
+
+static void pvfs2_invalidatepage(struct page *page,
+ unsigned int offset,
+ unsigned int length)
+{
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2_invalidatepage called on page %p "
+ "(offset is %u)\n",
+ page,
+ offset);
+
+ ClearPageUptodate(page);
+ ClearPageMappedToDisk(page);
+ return;
+
+}
+
+static int pvfs2_releasepage(struct page *page, gfp_t foo)
+{
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2_releasepage called on page %p\n",
+ page);
+ return 0;
+}
+
+/*
+ * Having a direct_IO entry point in the address_space_operations
+ * struct causes the kernel to allows us to use O_DIRECT on
+ * open. Nothing will ever call this thing, but in the future we
+ * will need to be able to use O_DIRECT on open in order to support
+ * AIO. Modeled after NFS, they do this too.
+ */
+/*
+static ssize_t pvfs2_direct_IO(int rw,
+ struct kiocb *iocb,
+ struct iov_iter *iter,
+ loff_t offset)
+{
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2_direct_IO: %s\n",
+ iocb->ki_filp->f_path.dentry->d_name.name);
+
+ return -EINVAL;
+}
+*/
+
+struct backing_dev_info pvfs2_backing_dev_info = {
+ .name = "pvfs2",
+ .ra_pages = 0,
+ .capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK,
+};
+
+/** PVFS2 implementation of address space operations */
+const struct address_space_operations pvfs2_address_operations = {
+ .readpage = pvfs2_readpage,
+ .readpages = pvfs2_readpages,
+ .invalidatepage = pvfs2_invalidatepage,
+ .releasepage = pvfs2_releasepage,
+/* .direct_IO = pvfs2_direct_IO */
+};
+
+static int pvfs2_setattr_size(struct inode *inode, struct iattr *iattr)
+{
+ struct pvfs2_inode_s *pvfs2_inode = PVFS2_I(inode);
+ struct pvfs2_kernel_op_s *new_op;
+ loff_t orig_size = i_size_read(inode);
+ int ret = -EINVAL;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
+ __func__,
+ get_khandle_from_ino(inode),
+ &pvfs2_inode->refn.khandle,
+ pvfs2_inode->refn.fs_id,
+ iattr->ia_size);
+
+ truncate_setsize(inode, iattr->ia_size);
+
+ new_op = op_alloc(PVFS2_VFS_OP_TRUNCATE);
+ if (!new_op)
+ return -ENOMEM;
+
+ new_op->upcall.req.truncate.refn = pvfs2_inode->refn;
+ new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
+
+ ret = service_operation(new_op, __func__,
+ get_interruptible_flag(inode));
+
+ /*
+ * the truncate has no downcall members to retrieve, but
+ * the status value tells us if it went through ok or not
+ */
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2: pvfs2_truncate got return value of %d\n",
+ ret);
+
+ op_release(new_op);
+
+ if (ret != 0)
+ return ret;
+
+ /*
+ * Only change the c/mtime if we are changing the size or we are
+ * explicitly asked to change it. This handles the semantic difference
+ * between truncate() and ftruncate() as implemented in the VFS.
+ *
+ * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
+ * special case where we need to update the times despite not having
+ * these flags set. For all other operations the VFS set these flags
+ * explicitly if it wants a timestamp update.
+ */
+ if (orig_size != i_size_read(inode) &&
+ !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
+ iattr->ia_ctime = iattr->ia_mtime =
+ current_fs_time(inode->i_sb);
+ iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
+ }
+
+ return ret;
+}
+
+/*
+ * Change attributes of an object referenced by dentry.
+ */
+int pvfs2_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+ int ret = -EINVAL;
+ struct inode *inode = dentry->d_inode;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2_setattr: called on %s\n",
+ dentry->d_name.name);
+
+ ret = inode_change_ok(inode, iattr);
+ if (ret)
+ goto out;
+
+ if ((iattr->ia_valid & ATTR_SIZE) &&
+ iattr->ia_size != i_size_read(inode)) {
+ ret = pvfs2_setattr_size(inode, iattr);
+ if (ret)
+ goto out;
+ }
+
+ setattr_copy(inode, iattr);
+ mark_inode_dirty(inode);
+
+ ret = pvfs2_inode_setattr(inode, iattr);
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2_setattr: inode_setattr returned %d\n",
+ ret);
+
+ if (!ret && (iattr->ia_valid & ATTR_MODE))
+ /* change mod on a file that has ACLs */
+ ret = posix_acl_chmod(inode, inode->i_mode);
+
+out:
+ gossip_debug(GOSSIP_INODE_DEBUG, "pvfs2_setattr: returning %d\n", ret);
+ return ret;
+}
+
+/*
+ * Obtain attributes of an object given a dentry
+ */
+int pvfs2_getattr(struct vfsmount *mnt,
+ struct dentry *dentry,
+ struct kstat *kstat)
+{
+ int ret = -ENOENT;
+ struct inode *inode = dentry->d_inode;
+ struct pvfs2_inode_s *pvfs2_inode = NULL;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2_getattr: called on %s\n",
+ dentry->d_name.name);
+
+ /*
+ * Similar to the above comment, a getattr also expects that all
+ * fields/attributes of the inode would be refreshed. So again, we
+ * dont have too much of a choice but refresh all the attributes.
+ */
+ ret = pvfs2_inode_getattr(inode, PVFS_ATTR_SYS_ALL_NOHINT);
+ if (ret == 0) {
+ generic_fillattr(inode, kstat);
+ /* override block size reported to stat */
+ pvfs2_inode = PVFS2_I(inode);
+ kstat->blksize = pvfs2_inode->blksize;
+ } else {
+ /* assume an I/O error and flag inode as bad */
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s:%s:%d calling make bad inode\n",
+ __FILE__,
+ __func__,
+ __LINE__);
+ pvfs2_make_bad_inode(inode);
+ }
+ return ret;
+}
+
+/* PVFS2 implementation of VFS inode operations for files */
+struct inode_operations pvfs2_file_inode_operations = {
+ .get_acl = pvfs2_get_acl,
+ .set_acl = pvfs2_set_acl,
+ .setattr = pvfs2_setattr,
+ .getattr = pvfs2_getattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = pvfs2_listxattr,
+ .removexattr = generic_removexattr,
+};
+
+static int pvfs2_init_iops(struct inode *inode)
+{
+ inode->i_mapping->a_ops = &pvfs2_address_operations;
+
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFREG:
+ inode->i_op = &pvfs2_file_inode_operations;
+ inode->i_fop = &pvfs2_file_operations;
+ inode->i_blkbits = PAGE_CACHE_SHIFT;
+ break;
+ case S_IFLNK:
+ inode->i_op = &pvfs2_symlink_inode_operations;
+ break;
+ case S_IFDIR:
+ inode->i_op = &pvfs2_dir_inode_operations;
+ inode->i_fop = &pvfs2_dir_operations;
+ break;
+ default:
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s: unsupported mode\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Given a PVFS2 object identifier (fsid, handle), convert it into a ino_t type
+ * that will be used as a hash-index from where the handle will
+ * be searched for in the VFS hash table of inodes.
+ */
+static inline ino_t pvfs2_handle_hash(struct pvfs2_object_kref *ref)
+{
+ if (!ref)
+ return 0;
+ return pvfs2_khandle_to_ino(&(ref->khandle));
+}
+
+/*
+ * Called to set up an inode from iget5_locked.
+ */
+static int pvfs2_set_inode(struct inode *inode, void *data)
+{
+ struct pvfs2_object_kref *ref = (struct pvfs2_object_kref *) data;
+ struct pvfs2_inode_s *pvfs2_inode = NULL;
+
+ /* Make sure that we have sane parameters */
+ if (!data || !inode)
+ return 0;
+ pvfs2_inode = PVFS2_I(inode);
+ if (!pvfs2_inode)
+ return 0;
+ pvfs2_inode->refn.fs_id = ref->fs_id;
+ pvfs2_inode->refn.khandle = ref->khandle;
+ return 0;
+}
+
+/*
+ * Called to determine if handles match.
+ */
+static int pvfs2_test_inode(struct inode *inode, void *data)
+{
+ struct pvfs2_object_kref *ref = (struct pvfs2_object_kref *) data;
+ struct pvfs2_inode_s *pvfs2_inode = NULL;
+
+ pvfs2_inode = PVFS2_I(inode);
+ return (!PVFS_khandle_cmp(&(pvfs2_inode->refn.khandle), &(ref->khandle))
+ && pvfs2_inode->refn.fs_id == ref->fs_id);
+}
+
+/*
+ * Front-end to lookup the inode-cache maintained by the VFS using the PVFS2
+ * file handle.
+ *
+ * @sb: the file system super block instance.
+ * @ref: The PVFS2 object for which we are trying to locate an inode structure.
+ */
+struct inode *pvfs2_iget(struct super_block *sb, struct pvfs2_object_kref *ref)
+{
+ struct inode *inode = NULL;
+ unsigned long hash;
+ int error;
+
+ hash = pvfs2_handle_hash(ref);
+ inode = iget5_locked(sb, hash, pvfs2_test_inode, pvfs2_set_inode, ref);
+ if (!inode || !(inode->i_state & I_NEW))
+ return inode;
+
+ error = pvfs2_inode_getattr(inode, PVFS_ATTR_SYS_ALL_NOHINT);
+ if (error) {
+ iget_failed(inode);
+ return ERR_PTR(error);
+ }
+
+ inode->i_ino = hash; /* needed for stat etc */
+ pvfs2_init_iops(inode);
+ unlock_new_inode(inode);
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
+ &ref->khandle,
+ ref->fs_id,
+ hash,
+ inode->i_ino);
+
+ return inode;
+}
+
+/*
+ * Allocate an inode for a newly created file and insert it into the inode hash.
+ */
+struct inode *pvfs2_new_inode(struct super_block *sb, struct inode *dir,
+ int mode, dev_t dev, struct pvfs2_object_kref *ref)
+{
+ unsigned long hash = pvfs2_handle_hash(ref);
+ struct inode *inode;
+ int error;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "pvfs2_get_custom_inode_common: called\n"
+ "(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
+ sb,
+ MAJOR(dev),
+ MINOR(dev),
+ mode);
+
+ inode = new_inode(sb);
+ if (!inode)
+ return NULL;
+
+ pvfs2_set_inode(inode, ref);
+ inode->i_ino = hash; /* needed for stat etc */
+
+ error = pvfs2_inode_getattr(inode, PVFS_ATTR_SYS_ALL_NOHINT);
+ if (error)
+ goto out_iput;
+
+ pvfs2_init_iops(inode);
+
+ inode->i_mode = mode;
+ inode->i_uid = current_fsuid();
+ inode->i_gid = current_fsgid();
+ inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ inode->i_size = PAGE_CACHE_SIZE;
+ inode->i_rdev = dev;
+
+ error = insert_inode_locked4(inode, hash, pvfs2_test_inode, ref);
+ if (error < 0)
+ goto out_iput;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "Initializing ACL's for inode %pU\n",
+ get_khandle_from_ino(inode));
+ pvfs2_init_acl(inode, dir);
+ return inode;
+
+out_iput:
+ iput(inode);
+ return ERR_PTR(error);
+}
projects / mirror_ubuntu-bionic-kernel.git / commitdiff