LU-12526 pcc: Auto attach for PCC during IO

[fs/lustre-release.git] / lustre / llite / pcc.h

diff --git a/lustre/llite/pcc.h b/lustre/llite/pcc.h
index d2c8512..7323a03 100644 (file)
--- a/lustre/llite/pcc.h
+++ b/lustre/llite/pcc.h
@@ -92,12 +92,19 @@ struct pcc_matcher {
 
 enum pcc_dataset_flags {
        PCC_DATASET_NONE        = 0x0,
-       /* Try auto attach at open, disabled by default */
-       PCC_DATASET_OPEN_ATTACH = 0x1,
+       /* Try auto attach at open, enabled by default */
+       PCC_DATASET_OPEN_ATTACH = 0x01,
+       /* Try auto attach during IO when layout refresh, enabled by default */
+       PCC_DATASET_IO_ATTACH   = 0x02,
+       /* Try auto attach at stat */
+       PCC_DATASET_STAT_ATTACH = 0x04,
+       PCC_DATASET_AUTO_ATTACH = PCC_DATASET_OPEN_ATTACH |
+                                 PCC_DATASET_IO_ATTACH |
+                                 PCC_DATASET_STAT_ATTACH,
        /* PCC backend is only used for RW-PCC */
-       PCC_DATASET_RWPCC       = 0x2,
+       PCC_DATASET_RWPCC       = 0x08,
        /* PCC backend is only used for RO-PCC */
-       PCC_DATASET_ROPCC       = 0x4,
+       PCC_DATASET_ROPCC       = 0x10,
        /* PCC backend provides caching services for both RW-PCC and RO-PCC */
        PCC_DATASET_PCC_ALL     = PCC_DATASET_RWPCC | PCC_DATASET_ROPCC,
 };
@@ -153,6 +160,25 @@ struct pcc_file {
        enum lu_pcc_type         pccf_type;
 };
 
+enum pcc_io_type {
+       /* read system call */
+       PIT_READ = 1,
+       /* write system call */
+       PIT_WRITE,
+       /* truncate, utime system calls */
+       PIT_SETATTR,
+       /* stat system call */
+       PIT_GETATTR,
+       /* mmap write handling */
+       PIT_PAGE_MKWRITE,
+       /* page fault handling */
+       PIT_FAULT,
+       /* fsync system call handling */
+       PIT_FSYNC,
+       /* splice_read system call */
+       PIT_SPLICE_READ
+};
+
 enum pcc_cmd_type {
        PCC_ADD_DATASET = 0,
        PCC_DEL_DATASET,
@@ -176,6 +202,11 @@ struct pcc_cmd {
        } u;
 };
 
+struct pcc_create_attach {
+       struct pcc_dataset *pca_dataset;
+       struct dentry *pca_dentry;
+};
+
 int pcc_super_init(struct pcc_super *super);
 void pcc_super_fini(struct pcc_super *super);
 int pcc_cmd_handle(char *buffer, unsigned long count,
@@ -211,12 +242,12 @@ int pcc_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
                     bool *cached);
 int pcc_inode_create(struct super_block *sb, struct pcc_dataset *dataset,
                     struct lu_fid *fid, struct dentry **pcc_dentry);
-int pcc_inode_create_fini(struct pcc_dataset *dataset, struct inode *inode,
-                          struct dentry *pcc_dentry);
+int pcc_inode_create_fini(struct inode *inode, struct pcc_create_attach *pca);
+void pcc_create_attach_cleanup(struct super_block *sb,
+                              struct pcc_create_attach *pca);
 struct pcc_dataset *pcc_dataset_match_get(struct pcc_super *super,
                                          struct pcc_matcher *matcher);
 void pcc_dataset_put(struct pcc_dataset *dataset);
 void pcc_inode_free(struct inode *inode);
 void pcc_layout_invalidate(struct inode *inode);
-
 #endif /* LLITE_PCC_H */