#include "llite_internal.h"
#include <linux/lustre_compat25.h>
-/**
- * Finalizes cl-data before exiting typical address_space operation. Dual to
- * ll_cl_init().
- */
-void ll_cl_fini(struct ll_cl_context *lcc)
-{
- struct lu_env *env = lcc->lcc_env;
- struct cl_io *io = lcc->lcc_io;
- struct cl_page *page = lcc->lcc_page;
-
- LASSERT(lcc->lcc_cookie == current);
- LASSERT(env != NULL);
-
- if (page != NULL) {
- lu_ref_del(&page->cp_reference, "cl_io", io);
- cl_page_put(env, page);
- }
-
- cl_env_put(env, &lcc->lcc_refcheck);
-}
-
-/**
- * Initializes common cl-data at the typical address_space operation entry
- * point.
- */
-struct ll_cl_context *ll_cl_init(struct file *file, struct page *vmpage)
-{
- struct ll_cl_context *lcc;
- struct lu_env *env;
- struct cl_io *io;
- struct cl_object *clob;
- struct ccc_io *cio;
-
- int refcheck;
- int result = 0;
-
- clob = ll_i2info(file->f_dentry->d_inode)->lli_clob;
- LASSERT(clob != NULL);
-
- env = cl_env_get(&refcheck);
- if (IS_ERR(env))
- return ERR_PTR(PTR_ERR(env));
-
- lcc = &vvp_env_info(env)->vti_io_ctx;
- memset(lcc, 0, sizeof(*lcc));
- lcc->lcc_env = env;
- lcc->lcc_refcheck = refcheck;
- lcc->lcc_cookie = current;
-
- cio = ccc_env_io(env);
- io = cio->cui_cl.cis_io;
- lcc->lcc_io = io;
- if (io == NULL)
- result = -EIO;
- if (result == 0 && vmpage != NULL) {
- struct cl_page *page;
-
- LASSERT(io != NULL);
- LASSERT(io->ci_state == CIS_IO_GOING);
- LASSERT(cio->cui_fd == LUSTRE_FPRIVATE(file));
- page = cl_page_find(env, clob, vmpage->index, vmpage,
- CPT_CACHEABLE);
- if (!IS_ERR(page)) {
- lcc->lcc_page = page;
- lu_ref_add(&page->cp_reference, "cl_io", io);
- result = 0;
- } else
- result = PTR_ERR(page);
- }
- if (result) {
- ll_cl_fini(lcc);
- lcc = ERR_PTR(result);
- }
-
- return lcc;
-}
-
struct obd_capa *cl_capa_lookup(struct inode *inode, enum cl_req_type crt)
{
__u64 opc;
RETURN(result);
}
+struct ll_cl_context *ll_cl_find(struct file *file)
+{
+ struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
+ struct ll_cl_context *lcc;
+ struct ll_cl_context *found = NULL;
+
+ read_lock(&fd->fd_lock);
+ list_for_each_entry(lcc, &fd->fd_lccs, lcc_list) {
+ if (lcc->lcc_cookie == current) {
+ found = lcc;
+ break;
+ }
+ }
+ read_unlock(&fd->fd_lock);
+
+ return found;
+}
+
+void ll_cl_add(struct file *file, const struct lu_env *env, struct cl_io *io)
+{
+ struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
+ struct ll_cl_context *lcc = &vvp_env_info(env)->vti_io_ctx;
+
+ memset(lcc, 0, sizeof(*lcc));
+ INIT_LIST_HEAD(&lcc->lcc_list);
+ lcc->lcc_cookie = current;
+ lcc->lcc_env = env;
+ lcc->lcc_io = io;
+
+ write_lock(&fd->fd_lock);
+ list_add(&lcc->lcc_list, &fd->fd_lccs);
+ write_unlock(&fd->fd_lock);
+}
+
+void ll_cl_remove(struct file *file, const struct lu_env *env)
+{
+ struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
+ struct ll_cl_context *lcc = &vvp_env_info(env)->vti_io_ctx;
+
+ write_lock(&fd->fd_lock);
+ list_del_init(&lcc->lcc_list);
+ write_unlock(&fd->fd_lock);
+}
+
int ll_readpage(struct file *file, struct page *vmpage)
{
- struct ll_cl_context *lcc;
- int result;
- ENTRY;
+ struct cl_object *clob = ll_i2info(file->f_dentry->d_inode)->lli_clob;
+ struct ll_cl_context *lcc;
+ const struct lu_env *env;
+ struct cl_io *io;
+ struct cl_page *page;
+ int result;
+ ENTRY;
- lcc = ll_cl_init(file, vmpage);
- if (!IS_ERR(lcc)) {
- struct lu_env *env = lcc->lcc_env;
- struct cl_io *io = lcc->lcc_io;
- struct cl_page *page = lcc->lcc_page;
+ lcc = ll_cl_find(file);
+ if (lcc == NULL) {
+ unlock_page(vmpage);
+ RETURN(-EIO);
+ }
- LASSERT(page->cp_type == CPT_CACHEABLE);
- if (likely(!PageUptodate(vmpage))) {
- cl_page_assume(env, io, page);
- result = cl_io_read_page(env, io, page);
- } else {
- /* Page from a non-object file. */
- unlock_page(vmpage);
- result = 0;
- }
- ll_cl_fini(lcc);
- } else {
- unlock_page(vmpage);
- result = PTR_ERR(lcc);
+ env = lcc->lcc_env;
+ io = lcc->lcc_io;
+ LASSERT(io != NULL);
+ LASSERT(io->ci_state == CIS_IO_GOING);
+ page = cl_page_find(env, clob, vmpage->index, vmpage, CPT_CACHEABLE);
+ if (!IS_ERR(page)) {
+ LASSERT(page->cp_type == CPT_CACHEABLE);
+ if (likely(!PageUptodate(vmpage))) {
+ cl_page_assume(env, io, page);
+ result = cl_io_read_page(env, io, page);
+ } else {
+ /* Page from a non-object file. */
+ unlock_page(vmpage);
+ result = 0;
+ }
+ cl_page_put(env, page);
+ } else {
+ unlock_page(vmpage);
+ result = PTR_ERR(page);
}
- RETURN(result);
+ RETURN(result);
}
int ll_page_sync_io(const struct lu_env *env, struct cl_io *io,