From: Jim Rees <rees@umich.edu>
To: Benny Halevy <bhalevy@panasas.com>
Cc: linux-nfs@vger.kernel.org, peter honeyman <honey@citi.umich.edu>
Subject: [PATCH 20/88] pnfsblock: basic extent code
Date: Tue, 7 Jun 2011 13:28:08 -0400 [thread overview]
Message-ID: <9a0c7e739fed3870d5d859cd293b9493a8833188.1307464382.git.rees@umich.edu> (raw)
In-Reply-To: <cover.1307464381.git.rees@umich.edu>
From: Fred Isaman <iisaman@citi.umich.edu>
Adds structures and basic create/delete code for extents.
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
---
fs/nfs/blocklayout/Makefile | 3 +-
fs/nfs/blocklayout/blocklayout.c | 17 ++++++++++-
fs/nfs/blocklayout/blocklayout.h | 23 +++++++++++++++-
fs/nfs/blocklayout/extents.c | 55 ++++++++++++++++++++++++++++++++++++++
4 files changed, 94 insertions(+), 4 deletions(-)
create mode 100644 fs/nfs/blocklayout/extents.c
diff --git a/fs/nfs/blocklayout/Makefile b/fs/nfs/blocklayout/Makefile
index 2c4c062..1e7619f 100644
--- a/fs/nfs/blocklayout/Makefile
+++ b/fs/nfs/blocklayout/Makefile
@@ -2,4 +2,5 @@
# Makefile for the pNFS block layout driver kernel module
#
obj-$(CONFIG_PNFS_BLOCK) += blocklayoutdriver.o
-blocklayoutdriver-objs := blocklayout.o blocklayoutdev.o blocklayoutdm.o
+blocklayoutdriver-objs := blocklayout.o blocklayoutdev.o blocklayoutdm.o \
+ extents.o
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 677836c..fb06f3a 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -83,12 +83,25 @@ bl_write_pagelist(struct pnfs_layout_type *lo,
return PNFS_NOT_ATTEMPTED;
}
-/* STUB */
+/* FIXME - range ignored */
static void
release_extents(struct pnfs_block_layout *bl,
struct nfs4_pnfs_layout_segment *range)
{
- return;
+ int i;
+ struct pnfs_block_extent *be;
+
+ spin_lock(&bl->bl_ext_lock);
+ for (i = 0; i < EXTENT_LISTS; i++) {
+ while (!list_empty(&bl->bl_extents[i])) {
+ be = list_first_entry(&bl->bl_extents[i],
+ struct pnfs_block_extent,
+ be_node);
+ list_del(&be->be_node);
+ put_extent(be);
+ }
+ }
+ spin_unlock(&bl->bl_ext_lock);
}
/* STUB */
diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h
index dd25f1a..4e6f8fc 100644
--- a/fs/nfs/blocklayout/blocklayout.h
+++ b/fs/nfs/blocklayout/blocklayout.h
@@ -99,10 +99,30 @@ struct pnfs_blk_sig {
struct pnfs_blk_sig_comp si_comps[PNFS_BLOCK_MAX_SIG_COMP];
};
+enum exstate4 {
+ PNFS_BLOCK_READWRITE_DATA = 0,
+ PNFS_BLOCK_READ_DATA = 1,
+ PNFS_BLOCK_INVALID_DATA = 2, /* mapped, but data is invalid */
+ PNFS_BLOCK_NONE_DATA = 3 /* unmapped, it's a hole */
+};
+
struct pnfs_inval_markings {
/* STUB */
};
+/* sector_t fields are all in 512-byte sectors */
+struct pnfs_block_extent {
+ struct kref be_refcnt;
+ struct list_head be_node; /* link into lseg list */
+ struct pnfs_deviceid be_devid; /* STUB - remevable??? */
+ struct block_device *be_mdev;
+ sector_t be_f_offset; /* the starting offset in the file */
+ sector_t be_length; /* the size of the extent */
+ sector_t be_v_offset; /* the starting offset in the volume */
+ enum exstate4 be_state; /* the state of this extent */
+ struct pnfs_inval_markings *be_inval; /* tracks INVAL->RW transition */
+};
+
static inline void
INIT_INVAL_MARKS(struct pnfs_inval_markings *marks, sector_t blocksize)
{
@@ -170,5 +190,6 @@ struct pnfs_block_dev *nfs4_blk_init_metadev(struct super_block *sb,
struct pnfs_device *dev);
int nfs4_blk_flatten(struct pnfs_blk_volume *, int, struct pnfs_block_dev *);
void free_block_dev(struct pnfs_block_dev *bdev);
-
+/* extents.c */
+void put_extent(struct pnfs_block_extent *be);
#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */
diff --git a/fs/nfs/blocklayout/extents.c b/fs/nfs/blocklayout/extents.c
new file mode 100644
index 0000000..efdcc08
--- /dev/null
+++ b/fs/nfs/blocklayout/extents.c
@@ -0,0 +1,55 @@
+/*
+ * linux/fs/nfs/blocklayout/blocklayout.h
+ *
+ * Module for the NFSv4.1 pNFS block layout driver.
+ *
+ * Copyright (c) 2006 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Andy Adamson <andros@citi.umich.edu>
+ * Fred Isaman <iisaman@umich.edu>
+ *
+ * permission is granted to use, copy, create derivative works and
+ * redistribute this software and such derivative works for any purpose,
+ * so long as the name of the university of michigan is not used in
+ * any advertising or publicity pertaining to the use or distribution
+ * of this software without specific, written prior authorization. if
+ * the above copyright notice or any other identification of the
+ * university of michigan is included in any copy of any portion of
+ * this software, then the disclaimer below must also be included.
+ *
+ * this software is provided as is, without representation from the
+ * university of michigan as to its fitness for any purpose, and without
+ * warranty by the university of michigan of any kind, either express
+ * or implied, including without limitation the implied warranties of
+ * merchantability and fitness for a particular purpose. the regents
+ * of the university of michigan shall not be liable for any damages,
+ * including special, indirect, incidental, or consequential damages,
+ * with respect to any claim arising out or in connection with the use
+ * of the software, even if it has been or is hereafter advised of the
+ * possibility of such damages.
+ */
+
+#include "blocklayout.h"
+#define NFSDBG_FACILITY NFSDBG_PNFS_LD
+
+static void
+destroy_extent(struct kref *kref)
+{
+ struct pnfs_block_extent *be;
+
+ be = container_of(kref, struct pnfs_block_extent, be_refcnt);
+ dprintk("%s be=%p\n", __func__, be);
+ kfree(be);
+}
+
+void
+put_extent(struct pnfs_block_extent *be)
+{
+ if (be) {
+ dprintk("%s enter %p (%i)\n", __func__, be,
+ atomic_read(&be->be_refcnt.refcount));
+ kref_put(&be->be_refcnt, destroy_extent);
+ }
+}
+
--
1.7.4.1
next prev parent reply other threads:[~2011-06-07 17:28 UTC|newest]
Thread overview: 136+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 17:24 [PATCH 00/88] pnfs block layout driver rees
2011-06-07 17:26 ` [PATCH 01/88] pnfs: add set-clear layoutdriver interface Jim Rees
2011-06-07 17:26 ` [PATCH 02/88] pnfs: let layoutcommit code handle multiple segments Jim Rees
2011-06-07 17:26 ` [PATCH 03/88] pnfs_post_submit: Restore "pnfs: pnfs_do_flush" part 1 Jim Rees
2011-06-07 17:26 ` [PATCH 04/88] pnfs_post_submit: Restore the pnfs_write_end part of "pnfs: commit and pnfs_write_end" Jim Rees
2011-06-07 17:26 ` [PATCH 05/88] pnfs: xdr support for three word attribute bitmap Jim Rees
2011-06-07 17:26 ` [PATCH 06/88] pnfs: HACK: ask for layout_blksize on mount Jim Rees
2011-06-07 17:26 ` [PATCH 07/88] pnfs: HACK: modify write_end_cleanup Jim Rees
2011-06-07 17:26 ` [PATCH 08/88] HACK: propagate fsdata into nfs_writepage_setup Jim Rees
2011-06-07 17:26 ` [PATCH 09/88] pnfs: HACK: adjust eof handling Jim Rees
2011-06-07 17:27 ` [PATCH 10/88] pnfsblock: define PNFS_BLOCK Kconfig option Jim Rees
2011-06-07 17:27 ` [PATCH 11/88] pnfsblock: blocklayout stub Jim Rees
2011-06-07 17:27 ` [PATCH 12/88] pnfsblock: expose scsi interface Jim Rees
2011-06-07 17:27 ` [PATCH 13/88] pnfsblock: scan scsi devices Jim Rees
2011-06-07 17:27 ` [PATCH 14/88] pnfsblock: call and parse getdevicelist Jim Rees
2011-06-07 17:27 ` [PATCH 15/88] pnfsblock: dm kernel interface Jim Rees
2011-06-07 17:27 ` [PATCH 16/88] pnfsblock: select BLK_DEV_DM when PNFS_BLOCK is configured Jim Rees
2011-06-07 17:27 ` [PATCH 17/88] pnfsblock: create and destroy dm metadevice Jim Rees
2011-06-07 17:27 ` [PATCH 18/88] pnfsblock: construct and load md table Jim Rees
2011-06-07 17:28 ` [PATCH 19/88] pnfsblock: layout alloc and free Jim Rees
2011-06-07 17:28 ` Jim Rees [this message]
2011-06-07 17:28 ` [PATCH 21/88] pnfsblock: lseg " Jim Rees
2011-06-07 17:28 ` [PATCH 22/88] pnfsblock: xdr decode pnfs_block_layout4 Jim Rees
2011-06-07 17:28 ` [PATCH 23/88] pnfsblock: merge extents Jim Rees
2011-06-07 17:28 ` [PATCH 24/88] pnfsblock: find_get_extent Jim Rees
2011-06-07 17:28 ` [PATCH 25/88] pnfsblock: bl_read_pagelist Jim Rees
2011-06-07 17:28 ` [PATCH 26/88] pnfsblock: allow use of PG_owner_priv_1 flag Jim Rees
2011-06-07 17:29 ` [PATCH 27/88] pnfsblock: read path error handling Jim Rees
2011-06-07 17:29 ` [PATCH 28/88] pnfsblock: SPLITME: add extent manipulation functions Jim Rees
2011-06-07 17:29 ` [PATCH 29/88] pnfsblock: write_begin Jim Rees
2011-06-07 17:29 ` [PATCH 30/88] pnfsblock: write_end Jim Rees
2011-06-07 17:29 ` [PATCH 31/88] pnfsblock: write_end_cleanup Jim Rees
2011-06-07 17:29 ` [PATCH 32/88] pnfsblock: bl_write_pagelist support functions Jim Rees
2011-06-07 17:29 ` [PATCH 33/88] pnfsblock: bl_write_pagelist Jim Rees
2011-06-07 17:29 ` [PATCH 34/88] pnfsblock: note written INVAL areas for layoutcommit Jim Rees
2011-06-07 17:30 ` [PATCH 35/88] pnfsblock: bl_setup_layoutcommit Jim Rees
2011-06-07 17:30 ` [PATCH 36/88] pnfsblock: encode_layoutcommit Jim Rees
2011-06-07 17:30 ` [PATCH 37/88] pnfsblock: cleanup_layoutcommit Jim Rees
2011-06-07 17:30 ` [PATCH 38/88] pnfsblock: merge rw extents Jim Rees
2011-06-07 17:30 ` [PATCH 39/88] pnfsblock: debugging dprintks for clist info Jim Rees
2011-06-07 17:30 ` [PATCH 40/88] SQAUSHME: blocklayoutdriver: NULL pointer reference when committing too many extents Jim Rees
2011-06-07 17:30 ` [PATCH 41/88] SQUASHME: pnfs-block: remove of CONFIG_PNFS fallout Jim Rees
2011-06-07 17:30 ` [PATCH 42/88] SQUASHME: pnfsblock: Fix a memory leak Jim Rees
2011-06-07 17:31 ` [PATCH 43/88] SQUASHME: pnfsblock: fix bug when decoding block device info Jim Rees
2011-06-07 17:31 ` [PATCH 44/88] SQUASHME: pnfsblock: Wrong extent refcount in block extents list Jim Rees
2011-06-07 17:31 ` [PATCH 45/88] SQUASHME: pnfsblock: Implement release_inval_marks Jim Rees
2011-06-07 17:31 ` [PATCH 46/88] SQUASHME: pnfsblock: Fix missing extent in commit list Jim Rees
2011-06-07 17:31 ` [PATCH 47/88] pnfsblock: use the session max response size for getdeviceinfo's maxcount Jim Rees
2011-06-07 17:31 ` [PATCH 48/88] SQUASHME: pnfs-block: fix compile breakage Jim Rees
2011-06-07 17:31 ` [PATCH 49/88] SQUASHME: pnfs-block: convert APIs pnfs-post-submit Jim Rees
2011-06-07 17:32 ` [PATCH 50/88] pnfsblock: Lookup list entry of layouts and tags in reverse order Jim Rees
2011-06-07 17:32 ` [PATCH 51/88] pnfsblock: expose block_class interface Jim Rees
2011-06-07 17:32 ` [PATCH 52/88] pnfsblock: iterating all local block disks instead of only scsi disks when initializing mount point Jim Rees
2011-06-07 17:32 ` [PATCH 53/88] SQUASHME: pnfsblock: set pnfs_blksize before calling set_pnfs_layoutdriver Jim Rees
2011-06-07 17:32 ` [PATCH 54/88] SQUASHME: pnfsblock: get rid of threshold policy ops Jim Rees
2011-06-07 17:32 ` [PATCH 55/88] SQUASHME: pnfsblock: write_begin adjust for removed fields Jim Rees
2011-06-07 17:32 ` [PATCH 56/88] SQUASHME: pnfsblock: write_end adjust for removed ok_to_use_pnfs Jim Rees
2011-06-07 17:32 ` [PATCH 57/88] SQUASHME: pnfsblock: write_end_cleanup " Jim Rees
2011-06-07 17:32 ` [PATCH 58/88] SQUASHME: pnfsblock: bl_write_pagelist support functions adjust for missing PG_USE_PNFS Jim Rees
2011-06-07 17:33 ` [PATCH 59/88] SQUASHME: pnfsblock: bl_write_pagelist " Jim Rees
2011-06-07 17:33 ` [PATCH 60/88] SQUASHME: pnfs-block: nfs4_blk_add_block_disk ret must be signed Jim Rees
2011-06-07 17:33 ` [PATCH 61/88] SQUASHME: pnfs-block: use new alloc/free_layout API Jim Rees
2011-06-07 17:33 ` [PATCH 62/88] SQUASHME: pnfs-block: use new commit api Jim Rees
2011-06-07 17:33 ` [PATCH 63/88] SQUASHME: pnfs-block: use new read_pagelist api Jim Rees
2011-06-07 17:33 ` [PATCH 64/88] SQUASHME: pnfs-block: use new write_pagelist api Jim Rees
2011-06-07 17:33 ` [PATCH 65/88] pnfs-block: Add support for simple rpc pipefs Jim Rees
2011-06-07 17:33 ` [PATCH 66/88] pnfs-block: Remove device creation from kernel Jim Rees
2011-06-07 17:33 ` [PATCH 67/88] SQUASHME: pnfs-block: apply types rename Jim Rees
2011-06-07 17:34 ` [PATCH 68/88] SQUASHME: pnfs-block: Revert "pnfsblock: expose block_class interface" Jim Rees
2011-06-07 17:34 ` [PATCH 69/88] SQUASHME: pnfsblock: remove obsolete include file from blocklayout.h Jim Rees
2011-06-07 17:34 ` [PATCH 70/88] SQUASHME: pnfsblock: use nfs4_deviceid Jim Rees
2011-06-07 17:34 ` [PATCH 71/88] SQUASHME: pnfsblock: no callback ops Jim Rees
2011-06-07 17:34 ` [PATCH 72/88] SQAUSHME: pnfsblock: no PNFS_NFS_SERVER Jim Rees
2011-06-07 17:34 ` [PATCH 73/88] SQUASHME: pnfsblock: no dev_notify_types Jim Rees
2011-06-07 17:34 ` [PATCH 74/88] SQUASHME: pnfsblock: use new struct pnfs_layout_hdr Jim Rees
2011-06-07 17:34 ` [PATCH 75/88] SQUASHME: pnfsblock: compile error in blocklayout code Jim Rees
2011-06-07 17:34 ` [PATCH 76/88] SQUASHME: pnfs-block: deprecate get_stripesize Jim Rees
2011-06-07 17:35 ` [PATCH 77/88] move include lines out of include file Jim Rees
2011-06-07 17:35 ` [PATCH 78/88] SQUASHME: pnfs-block: use {set,clear}_layoutdriver Jim Rees
2011-06-07 17:35 ` [PATCH 79/88] SQUASHME: pnfs-block: Return failure from bl_initialize_mountpoint Jim Rees
2011-06-07 17:35 ` [PATCH 80/88] SQUASHME: pnfs-block: fixup setup_layoutcommit arguments Jim Rees
2011-06-07 17:35 ` [PATCH 81/88] SQUASHME: pnfs-block: fixup cleanup_layoutcommit arguments Jim Rees
2011-06-07 17:35 ` [PATCH 82/88] SQUASHME: pnfs-block: fixup encode_layoutcommit arguments Jim Rees
2011-06-07 17:35 ` [PATCH 83/88] SQUASHME: pnfs-block: fixup layoutcommit methods args Jim Rees
2011-06-07 17:35 ` [PATCH 84/88] pnfs-block: fix blocklayoutdev.c for new blkdev_get_by_dev() Jim Rees
2011-06-07 17:35 ` [PATCH 85/88] SQUASHME: pnfs-block: use pnfs_layout_hdr field prefix Jim Rees
2011-06-07 17:35 ` [PATCH 86/88] SQUASHME: pnfs: blocklayout: port block layout code Jim Rees
2011-06-08 1:27 ` Benny Halevy
2011-06-08 2:06 ` Benny Halevy
2011-06-08 7:38 ` Peng Tao
2011-06-07 17:36 ` [PATCH 87/88] Add configurable prefetch size for layoutget Jim Rees
2011-06-08 2:01 ` Benny Halevy
2011-06-08 2:18 ` Jim Rees
2011-06-08 7:15 ` Peng Tao
2011-06-09 6:06 ` Benny Halevy
2011-06-09 11:49 ` Jim Rees
2011-06-09 13:32 ` Benny Halevy
2011-06-09 13:58 ` Jim Rees
2011-06-09 15:07 ` Peng Tao
2011-06-09 21:22 ` Benny Halevy
2011-06-10 6:00 ` tao.peng
2011-06-10 12:33 ` Benny Halevy
2011-06-10 14:09 ` tao.peng
2011-06-10 19:23 ` Benny Halevy
2011-06-10 20:03 ` Fred Isaman
2011-06-10 21:15 ` Benny Halevy
2011-06-11 1:46 ` Peng Tao
2011-06-10 23:20 ` Boaz Harrosh
2011-06-11 2:19 ` Peng Tao
2011-06-12 14:40 ` Boaz Harrosh
2011-06-12 18:46 ` Peng Tao
2011-06-11 1:35 ` Peng Tao
2011-06-09 21:23 ` Benny Halevy
2011-06-10 5:36 ` tao.peng
2011-06-10 12:36 ` Benny Halevy
2011-06-10 14:17 ` tao.peng
2011-06-10 19:02 ` Benny Halevy
2011-06-09 15:01 ` Peng Tao
2011-06-09 14:54 ` Peng Tao
2011-06-09 21:30 ` Benny Halevy
2011-06-10 6:02 ` tao.peng
2011-06-10 12:47 ` Benny Halevy
2011-06-10 14:30 ` tao.peng
2011-06-10 19:07 ` Benny Halevy
2011-06-10 16:23 ` Boaz Harrosh
2011-06-10 16:44 ` Boaz Harrosh
2011-06-09 6:08 ` Benny Halevy
2011-06-07 17:36 ` [PATCH 88/88] NFS41: do not update isize if inode needs layoutcommit Jim Rees
2011-06-08 2:05 ` Benny Halevy
2011-06-08 7:06 ` Peng Tao
2011-06-08 7:29 ` Peng Tao
2011-06-09 21:52 ` [PATCH 00/88] pnfs block layout driver Boaz Harrosh
2011-06-09 22:15 ` Jim Rees
2011-06-10 2:16 ` Boaz Harrosh
2011-06-10 2:20 ` Boaz Harrosh
2011-06-10 4:04 ` Benny Halevy
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