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authorBoaz Harrosh <bharrosh@panasas.com>2009-11-08 14:54:08 +0200
committerBoaz Harrosh <bharrosh@panasas.com>2009-12-10 09:59:22 +0200
commit06886a5a3dc5a5abe0a4d257c26317bde7047be8 (patch)
tree858ac56e120c0473d764fc64a2660e6d79729c8c /fs/exofs/common.h
parent8ce9bdd1fbe962933736d7977e972972cd5d754c (diff)
exofs: Move all operations to an io_engine
In anticipation for multi-device operations, we separate osd operations into an abstract I/O API. Currently only one device is used but later when adding more devices, we will drive all devices in parallel according to a "data_map" that describes how data is arranged on multiple devices. The file system level operates, like before, as if there is one object (inode-number) and an i_size. The io engine will split this to the same object-number but on multiple device. At first we introduce Mirror (raid 1) layout. But at the final outcome we intend to fully implement the pNFS-Objects data-map, including raid 0,4,5,6 over mirrored devices, over multiple device-groups. And more. See: http://tools.ietf.org/html/draft-ietf-nfsv4-pnfs-obj-12 * Define an io_state based API for accessing osd storage devices in an abstract way. Usage: First a caller allocates an io state with: exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** ios); Then calles one of: exofs_sbi_create(struct exofs_io_state *ios); exofs_sbi_remove(struct exofs_io_state *ios); exofs_sbi_write(struct exofs_io_state *ios); exofs_sbi_read(struct exofs_io_state *ios); exofs_oi_truncate(struct exofs_i_info *oi, u64 new_len); And when done exofs_put_io_state(struct exofs_io_state *ios); * Convert all source files to use this new API * Convert from bio_alloc to bio_kmalloc * In io engine we make use of the now fixed osd_req_decode_sense There are no functional changes or on disk additions after this patch. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Diffstat (limited to 'fs/exofs/common.h')
-rw-r--r--fs/exofs/common.h18
1 files changed, 0 insertions, 18 deletions
diff --git a/fs/exofs/common.h b/fs/exofs/common.h
index c6718e4817f..ce1c7169259 100644
--- a/fs/exofs/common.h
+++ b/fs/exofs/common.h
@@ -155,22 +155,4 @@ enum {
(((name_len) + offsetof(struct exofs_dir_entry, name) + \
EXOFS_DIR_ROUND) & ~EXOFS_DIR_ROUND)
-/*************************
- * function declarations *
- *************************/
-/* osd.c */
-void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
- const struct osd_obj_id *obj);
-
-int exofs_check_ok_resid(struct osd_request *or, u64 *in_resid, u64 *out_resid);
-static inline int exofs_check_ok(struct osd_request *or)
-{
- return exofs_check_ok_resid(or, NULL, NULL);
-}
-int exofs_sync_op(struct osd_request *or, int timeout, u8 *cred);
-int exofs_async_op(struct osd_request *or,
- osd_req_done_fn *async_done, void *caller_context, u8 *cred);
-
-int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr);
-
#endif /*ifndef __EXOFS_COM_H__*/