LU-12400 osd-ldiskfs: support multi-page bvec

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

diff --git a/lustre/llite/pcc.h b/lustre/llite/pcc.h
index 0840a0b..d2c8512 100644 (file)
--- a/lustre/llite/pcc.h
+++ b/lustre/llite/pcc.h
@@ -90,12 +90,23 @@ struct pcc_matcher {
        struct qstr     *pm_name;
 };
 
+enum pcc_dataset_flags {
+       PCC_DATASET_NONE        = 0x0,
+       /* Try auto attach at open, disabled by default */
+       PCC_DATASET_OPEN_ATTACH = 0x1,
+       /* PCC backend is only used for RW-PCC */
+       PCC_DATASET_RWPCC       = 0x2,
+       /* PCC backend is only used for RO-PCC */
+       PCC_DATASET_ROPCC       = 0x4,
+       /* PCC backend provides caching services for both RW-PCC and RO-PCC */
+       PCC_DATASET_PCC_ALL     = PCC_DATASET_RWPCC | PCC_DATASET_ROPCC,
+};
+
 struct pcc_dataset {
        __u32                   pccd_rwid;       /* Archive ID */
        __u32                   pccd_roid;       /* Readonly ID */
        struct pcc_match_rule   pccd_rule;       /* Match rule */
-       __u32                   pccd_rwonly:1, /* Only use as RW-PCC */
-                               pccd_roonly:1; /* Only use as RO-PCC */
+       enum pcc_dataset_flags  pccd_flags;      /* flags of PCC backend */
        char                    pccd_pathname[PATH_MAX]; /* full path */
        struct path             pccd_path;       /* Root path */
        struct list_head        pccd_linkage;  /* Linked to pccs_datasets */
@@ -104,7 +115,7 @@ struct pcc_dataset {
 
 struct pcc_super {
        /* Protect pccs_datasets */
-       spinlock_t               pccs_lock;
+       struct rw_semaphore      pccs_rw_sem;
        /* List of datasets */
        struct list_head         pccs_datasets;
        /* creds of process who forced instantiation of super block */
@@ -157,6 +168,7 @@ struct pcc_cmd {
                        __u32                    pccc_roid;
                        struct list_head         pccc_conds;
                        char                    *pccc_conds_str;
+                       enum pcc_dataset_flags   pccc_flags;
                } pccc_add;
                struct pcc_cmd_del {
                        __u32                    pccc_pad;
@@ -174,7 +186,7 @@ int pcc_readwrite_attach(struct file *file, struct inode *inode,
 int pcc_readwrite_attach_fini(struct file *file, struct inode *inode,
                              __u32 gen, bool lease_broken, int rc,
                              bool attached);
-int pcc_ioctl_detach(struct inode *inode);
+int pcc_ioctl_detach(struct inode *inode, __u32 opt);
 int pcc_ioctl_state(struct file *file, struct inode *inode,
                    struct lu_pcc_state *state);
 void pcc_file_init(struct pcc_file *pccf);