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-rw-r--r--fs/nfs/pnfs.h486
1 files changed, 411 insertions, 75 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index e12367d5048..4fb309a2b4c 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -30,11 +30,27 @@
#ifndef FS_NFS_PNFS_H
#define FS_NFS_PNFS_H
+#include <linux/nfs_fs.h>
+#include <linux/nfs_page.h>
+
+enum {
+ NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
+ NFS_LSEG_ROC, /* roc bit received from server */
+ NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
+};
+
struct pnfs_layout_segment {
- struct list_head fi_list;
- struct pnfs_layout_range range;
- struct kref kref;
- struct pnfs_layout_hdr *layout;
+ struct list_head pls_list;
+ struct list_head pls_lc_list;
+ struct pnfs_layout_range pls_range;
+ atomic_t pls_refcount;
+ unsigned long pls_flags;
+ struct pnfs_layout_hdr *pls_layout;
+};
+
+enum pnfs_try_status {
+ PNFS_ATTEMPTED = 0,
+ PNFS_NOT_ATTEMPTED = 1,
};
#ifdef CONFIG_NFS_V4_1
@@ -44,113 +60,220 @@ struct pnfs_layout_segment {
enum {
NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
- NFS_LAYOUT_STATEID_SET, /* have a valid layout stateid */
+ NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
+ NFS_LAYOUT_ROC, /* some lseg had roc bit set */
+ NFS_LAYOUT_RETURN, /* Return this layout ASAP */
+};
+
+enum layoutdriver_policy_flags {
+ /* Should the pNFS client commit and return the layout upon a setattr */
+ PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
+ PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
};
+struct nfs4_deviceid_node;
+
/* Per-layout driver specific registration structure */
struct pnfs_layoutdriver_type {
struct list_head pnfs_tblid;
const u32 id;
const char *name;
struct module *owner;
- int (*set_layoutdriver) (struct nfs_server *);
+ unsigned flags;
+
+ int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
int (*clear_layoutdriver) (struct nfs_server *);
- struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr);
+
+ struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
+ void (*free_layout_hdr) (struct pnfs_layout_hdr *);
+
+ struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
void (*free_lseg) (struct pnfs_layout_segment *lseg);
+
+ /* test for nfs page cache coalescing */
+ const struct nfs_pageio_ops *pg_read_ops;
+ const struct nfs_pageio_ops *pg_write_ops;
+
+ struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
+ void (*mark_request_commit) (struct nfs_page *req,
+ struct pnfs_layout_segment *lseg,
+ struct nfs_commit_info *cinfo);
+ void (*clear_request_commit) (struct nfs_page *req,
+ struct nfs_commit_info *cinfo);
+ int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
+ int max);
+ void (*recover_commit_reqs) (struct list_head *list,
+ struct nfs_commit_info *cinfo);
+ int (*commit_pagelist)(struct inode *inode,
+ struct list_head *mds_pages,
+ int how,
+ struct nfs_commit_info *cinfo);
+
+ /*
+ * Return PNFS_ATTEMPTED to indicate the layout code has attempted
+ * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
+ */
+ enum pnfs_try_status (*read_pagelist) (struct nfs_pgio_data *nfs_data);
+ enum pnfs_try_status (*write_pagelist) (struct nfs_pgio_data *nfs_data, int how);
+
+ void (*free_deviceid_node) (struct nfs4_deviceid_node *);
+
+ void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutreturn_args *args);
+
+ void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
+
+ void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutcommit_args *args);
};
struct pnfs_layout_hdr {
- unsigned long refcount;
- struct list_head layouts; /* other client layouts */
- struct list_head segs; /* layout segments list */
- seqlock_t seqlock; /* Protects the stateid */
- nfs4_stateid stateid;
- unsigned long state;
- struct inode *inode;
+ atomic_t plh_refcount;
+ struct list_head plh_layouts; /* other client layouts */
+ struct list_head plh_bulk_destroy;
+ struct list_head plh_segs; /* layout segments list */
+ nfs4_stateid plh_stateid;
+ atomic_t plh_outstanding; /* number of RPCs out */
+ unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
+ u32 plh_barrier; /* ignore lower seqids */
+ unsigned long plh_retry_timestamp;
+ unsigned long plh_flags;
+ loff_t plh_lwb; /* last write byte for layoutcommit */
+ struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
+ struct inode *plh_inode;
};
struct pnfs_device {
struct nfs4_deviceid dev_id;
unsigned int layout_type;
unsigned int mincount;
+ unsigned int maxcount; /* gdia_maxcount */
struct page **pages;
- void *area;
unsigned int pgbase;
- unsigned int pglen;
+ unsigned int pglen; /* reply buffer length */
};
-/*
- * Device ID RCU cache. A device ID is unique per client ID and layout type.
- */
-#define NFS4_DEVICE_ID_HASH_BITS 5
-#define NFS4_DEVICE_ID_HASH_SIZE (1 << NFS4_DEVICE_ID_HASH_BITS)
-#define NFS4_DEVICE_ID_HASH_MASK (NFS4_DEVICE_ID_HASH_SIZE - 1)
-
-static inline u32
-nfs4_deviceid_hash(struct nfs4_deviceid *id)
-{
- unsigned char *cptr = (unsigned char *)id->data;
- unsigned int nbytes = NFS4_DEVICEID4_SIZE;
- u32 x = 0;
-
- while (nbytes--) {
- x *= 37;
- x += *cptr++;
- }
- return x & NFS4_DEVICE_ID_HASH_MASK;
-}
+#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
-struct pnfs_deviceid_node {
- struct hlist_node de_node;
- struct nfs4_deviceid de_id;
- atomic_t de_ref;
+struct pnfs_devicelist {
+ unsigned int eof;
+ unsigned int num_devs;
+ struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
};
-struct pnfs_deviceid_cache {
- spinlock_t dc_lock;
- atomic_t dc_ref;
- void (*dc_free_callback)(struct pnfs_deviceid_node *);
- struct hlist_head dc_deviceids[NFS4_DEVICE_ID_HASH_SIZE];
-};
-
-extern int pnfs_alloc_init_deviceid_cache(struct nfs_client *,
- void (*free_callback)(struct pnfs_deviceid_node *));
-extern void pnfs_put_deviceid_cache(struct nfs_client *);
-extern struct pnfs_deviceid_node *pnfs_find_get_deviceid(
- struct pnfs_deviceid_cache *,
- struct nfs4_deviceid *);
-extern struct pnfs_deviceid_node *pnfs_add_deviceid(
- struct pnfs_deviceid_cache *,
- struct pnfs_deviceid_node *);
-extern void pnfs_put_deviceid(struct pnfs_deviceid_cache *c,
- struct pnfs_deviceid_node *devid);
-
extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
/* nfs4proc.c */
+extern int nfs4_proc_getdevicelist(struct nfs_server *server,
+ const struct nfs_fh *fh,
+ struct pnfs_devicelist *devlist);
extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
- struct pnfs_device *dev);
-extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp);
+ struct pnfs_device *dev,
+ struct rpc_cred *cred);
+extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
+extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
/* pnfs.c */
-struct pnfs_layout_segment *
-pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
- enum pnfs_iomode access_type);
-void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
+void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
+void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
+
+void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
void unset_pnfs_layoutdriver(struct nfs_server *);
-int pnfs_layout_process(struct nfs4_layoutget *lgp);
+void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
+int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
+void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
+ struct nfs_page *req, u64 wb_size);
+int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
+size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
+ struct nfs_page *prev, struct nfs_page *req);
+void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
+struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
+void pnfs_free_lseg_list(struct list_head *tmp_list);
void pnfs_destroy_layout(struct nfs_inode *);
void pnfs_destroy_all_layouts(struct nfs_client *);
-void put_layout_hdr(struct inode *inode);
-void pnfs_get_layout_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo,
- struct nfs4_state *open_state);
+int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
+ struct nfs_fsid *fsid,
+ bool is_recall);
+int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
+ bool is_recall);
+void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
+void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
+ const nfs4_stateid *new,
+ bool update_barrier);
+int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
+ struct pnfs_layout_hdr *lo,
+ struct nfs4_state *open_state);
+int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
+ struct list_head *tmp_list,
+ struct pnfs_layout_range *recall_range);
+bool pnfs_roc(struct inode *ino);
+void pnfs_roc_release(struct inode *ino);
+void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
+bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task);
+void pnfs_set_layoutcommit(struct nfs_pgio_data *wdata);
+void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
+int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
+int _pnfs_return_layout(struct inode *);
+int pnfs_commit_and_return_layout(struct inode *);
+void pnfs_ld_write_done(struct nfs_pgio_data *);
+void pnfs_ld_read_done(struct nfs_pgio_data *);
+struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
+ struct nfs_open_context *ctx,
+ loff_t pos,
+ u64 count,
+ enum pnfs_iomode iomode,
+ gfp_t gfp_flags);
+void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
+int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head,
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq);
+int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq);
+struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
-static inline int lo_fail_bit(u32 iomode)
+/* nfs4_deviceid_flags */
+enum {
+ NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
+ NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
+};
+
+/* pnfs_dev.c */
+struct nfs4_deviceid_node {
+ struct hlist_node node;
+ struct hlist_node tmpnode;
+ const struct pnfs_layoutdriver_type *ld;
+ const struct nfs_client *nfs_client;
+ unsigned long flags;
+ unsigned long timestamp_unavailable;
+ struct nfs4_deviceid deviceid;
+ atomic_t ref;
+};
+
+struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
+void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
+void nfs4_init_deviceid_node(struct nfs4_deviceid_node *,
+ const struct pnfs_layoutdriver_type *,
+ const struct nfs_client *,
+ const struct nfs4_deviceid *);
+struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *);
+bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
+void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
+bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
+void nfs4_deviceid_purge_client(const struct nfs_client *);
+
+static inline struct pnfs_layout_segment *
+pnfs_get_lseg(struct pnfs_layout_segment *lseg)
{
- return iomode == IOMODE_RW ?
- NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED;
+ if (lseg) {
+ atomic_inc(&lseg->pls_refcount);
+ smp_mb__after_atomic();
+ }
+ return lseg;
}
/* Return true if a layout driver is being used for this mountpoint */
@@ -159,6 +282,114 @@ static inline int pnfs_enabled_sb(struct nfs_server *nfss)
return nfss->pnfs_curr_ld != NULL;
}
+static inline int
+pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
+ struct nfs_commit_info *cinfo)
+{
+ if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0)
+ return PNFS_NOT_ATTEMPTED;
+ return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo);
+}
+
+static inline struct pnfs_ds_commit_info *
+pnfs_get_ds_info(struct inode *inode)
+{
+ struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
+
+ if (ld == NULL || ld->get_ds_info == NULL)
+ return NULL;
+ return ld->get_ds_info(inode);
+}
+
+static inline bool
+pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
+ struct nfs_commit_info *cinfo)
+{
+ struct inode *inode = req->wb_context->dentry->d_inode;
+ struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
+
+ if (lseg == NULL || ld->mark_request_commit == NULL)
+ return false;
+ ld->mark_request_commit(req, lseg, cinfo);
+ return true;
+}
+
+static inline bool
+pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
+{
+ struct inode *inode = req->wb_context->dentry->d_inode;
+ struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
+
+ if (ld == NULL || ld->clear_request_commit == NULL)
+ return false;
+ ld->clear_request_commit(req, cinfo);
+ return true;
+}
+
+static inline int
+pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
+ int max)
+{
+ if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
+ return 0;
+ else
+ return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
+}
+
+static inline void
+pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list,
+ struct nfs_commit_info *cinfo)
+{
+ if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
+ return;
+ NFS_SERVER(inode)->pnfs_curr_ld->recover_commit_reqs(list, cinfo);
+}
+
+/* Should the pNFS client commit and return the layout upon a setattr */
+static inline bool
+pnfs_ld_layoutret_on_setattr(struct inode *inode)
+{
+ if (!pnfs_enabled_sb(NFS_SERVER(inode)))
+ return false;
+ return NFS_SERVER(inode)->pnfs_curr_ld->flags &
+ PNFS_LAYOUTRET_ON_SETATTR;
+}
+
+static inline bool
+pnfs_layoutcommit_outstanding(struct inode *inode)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+
+ return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
+ test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
+}
+
+static inline int pnfs_return_layout(struct inode *ino)
+{
+ struct nfs_inode *nfsi = NFS_I(ino);
+ struct nfs_server *nfss = NFS_SERVER(ino);
+
+ if (pnfs_enabled_sb(nfss) && nfsi->layout)
+ return _pnfs_return_layout(ino);
+
+ return 0;
+}
+
+static inline bool
+pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
+ struct nfs_server *nfss)
+{
+ return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
+ nfss->pnfs_curr_ld->id == src->l_type);
+}
+
+#ifdef NFS_DEBUG
+void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
+#else
+static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
+{
+}
+#endif /* NFS_DEBUG */
#else /* CONFIG_NFS_V4_1 */
static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
@@ -170,13 +401,55 @@ static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
}
static inline struct pnfs_layout_segment *
-pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
- enum pnfs_iomode access_type)
+pnfs_get_lseg(struct pnfs_layout_segment *lseg)
{
return NULL;
}
-static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id)
+static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
+{
+}
+
+static inline int pnfs_return_layout(struct inode *ino)
+{
+ return 0;
+}
+
+static inline int pnfs_commit_and_return_layout(struct inode *inode)
+{
+ return 0;
+}
+
+static inline bool
+pnfs_ld_layoutret_on_setattr(struct inode *inode)
+{
+ return false;
+}
+
+static inline bool
+pnfs_roc(struct inode *ino)
+{
+ return false;
+}
+
+static inline void
+pnfs_roc_release(struct inode *ino)
+{
+}
+
+static inline void
+pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
+{
+}
+
+static inline bool
+pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task)
+{
+ return false;
+}
+
+static inline void set_pnfs_layoutdriver(struct nfs_server *s,
+ const struct nfs_fh *mntfh, u32 id)
{
}
@@ -184,6 +457,69 @@ static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
{
}
+static inline int
+pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
+ struct nfs_commit_info *cinfo)
+{
+ return PNFS_NOT_ATTEMPTED;
+}
+
+static inline struct pnfs_ds_commit_info *
+pnfs_get_ds_info(struct inode *inode)
+{
+ return NULL;
+}
+
+static inline bool
+pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
+ struct nfs_commit_info *cinfo)
+{
+ return false;
+}
+
+static inline bool
+pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
+{
+ return false;
+}
+
+static inline int
+pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
+ int max)
+{
+ return 0;
+}
+
+static inline void
+pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list,
+ struct nfs_commit_info *cinfo)
+{
+}
+
+static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
+{
+ return 0;
+}
+
+static inline bool
+pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
+ struct nfs_server *nfss)
+{
+ return false;
+}
+
+static inline bool
+pnfs_layoutcommit_outstanding(struct inode *inode)
+{
+ return false;
+}
+
+
+static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
+{
+ return NULL;
+}
+
#endif /* CONFIG_NFS_V4_1 */
#endif /* FS_NFS_PNFS_H */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:45:10 +0000