diff options
Diffstat (limited to 'sys/fs/nandfs/nandfs_ifile.c')
| -rw-r--r-- | sys/fs/nandfs/nandfs_ifile.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/sys/fs/nandfs/nandfs_ifile.c b/sys/fs/nandfs/nandfs_ifile.c new file mode 100644 index 0000000..7e4db87 --- /dev/null +++ b/sys/fs/nandfs/nandfs_ifile.c @@ -0,0 +1,213 @@ +/*- + * Copyright (c) 2010-2012 Semihalf. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mount.h> +#include <sys/mutex.h> +#include <sys/namei.h> +#include <sys/sysctl.h> +#include <sys/vnode.h> +#include <sys/buf.h> +#include <sys/bio.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/vm_kern.h> +#include <vm/vm_page.h> + +#include <fs/nandfs/nandfs_mount.h> +#include <fs/nandfs/nandfs.h> +#include <fs/nandfs/nandfs_subr.h> + +int +nandfs_node_create(struct nandfsmount *nmp, struct nandfs_node **node, + uint16_t mode) +{ + struct nandfs_alloc_request req; + struct nandfs_device *nandfsdev; + struct nandfs_mdt *mdt; + struct nandfs_node *ifile; + struct nandfs_inode *inode; + struct vnode *vp; + uint32_t entry; + int error = 0; + + nandfsdev = nmp->nm_nandfsdev; + mdt = &nandfsdev->nd_ifile_mdt; + ifile = nmp->nm_ifile_node; + vp = NTOV(ifile); + + VOP_LOCK(vp, LK_EXCLUSIVE); + /* Allocate new inode in ifile */ + req.entrynum = nandfsdev->nd_last_ino + 1; + error = nandfs_find_free_entry(mdt, ifile, &req); + if (error) { + VOP_UNLOCK(vp, 0); + return (error); + } + + error = nandfs_get_entry_block(mdt, ifile, &req, &entry, 1); + if (error) { + VOP_UNLOCK(vp, 0); + return (error); + } + + /* Inode initialization */ + inode = ((struct nandfs_inode *) req.bp_entry->b_data) + entry; + nandfs_inode_init(inode, mode); + + error = nandfs_alloc_entry(mdt, &req); + if (error) { + VOP_UNLOCK(vp, 0); + return (error); + } + + VOP_UNLOCK(vp, 0); + + nandfsdev->nd_last_ino = req.entrynum; + error = nandfs_get_node(nmp, req.entrynum, node); + DPRINTF(IFILE, ("%s: node: %p ino: %#jx\n", + __func__, node, (uintmax_t)((*node)->nn_ino))); + + return (error); +} + +int +nandfs_node_destroy(struct nandfs_node *node) +{ + struct nandfs_alloc_request req; + struct nandfsmount *nmp; + struct nandfs_mdt *mdt; + struct nandfs_node *ifile; + struct vnode *vp; + int error = 0; + + nmp = node->nn_nmp; + req.entrynum = node->nn_ino; + mdt = &nmp->nm_nandfsdev->nd_ifile_mdt; + ifile = nmp->nm_ifile_node; + vp = NTOV(ifile); + + DPRINTF(IFILE, ("%s: destroy node: %p ino: %#jx\n", + __func__, node, (uintmax_t)node->nn_ino)); + VOP_LOCK(vp, LK_EXCLUSIVE); + + error = nandfs_find_entry(mdt, ifile, &req); + if (error) { + nandfs_error("%s: finding entry error:%d node %p(%jx)", + __func__, error, node, node->nn_ino); + VOP_UNLOCK(vp, 0); + return (error); + } + + nandfs_inode_destroy(&node->nn_inode); + + error = nandfs_free_entry(mdt, &req); + if (error) { + nandfs_error("%s: freing entry error:%d node %p(%jx)", + __func__, error, node, node->nn_ino); + VOP_UNLOCK(vp, 0); + return (error); + } + + VOP_UNLOCK(vp, 0); + DPRINTF(IFILE, ("%s: freed node %p ino %#jx\n", + __func__, node, (uintmax_t)node->nn_ino)); + return (error); +} + +int +nandfs_node_update(struct nandfs_node *node) +{ + struct nandfs_alloc_request req; + struct nandfsmount *nmp; + struct nandfs_mdt *mdt; + struct nandfs_node *ifile; + struct nandfs_inode *inode; + uint32_t index; + int error = 0; + + nmp = node->nn_nmp; + ifile = nmp->nm_ifile_node; + ASSERT_VOP_LOCKED(NTOV(ifile), __func__); + + req.entrynum = node->nn_ino; + mdt = &nmp->nm_nandfsdev->nd_ifile_mdt; + + DPRINTF(IFILE, ("%s: node:%p ino:%#jx\n", + __func__, &node->nn_inode, (uintmax_t)node->nn_ino)); + + error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0); + if (error) { + printf("nandfs_get_entry_block returned with ERROR=%d\n", + error); + return (error); + } + + inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index; + memcpy(inode, &node->nn_inode, sizeof(*inode)); + error = nandfs_dirty_buf(req.bp_entry, 0); + + return (error); +} + +int +nandfs_get_node_entry(struct nandfsmount *nmp, struct nandfs_inode **inode, + uint64_t ino, struct buf **bp) +{ + struct nandfs_alloc_request req; + struct nandfs_mdt *mdt; + struct nandfs_node *ifile; + struct vnode *vp; + uint32_t index; + int error = 0; + + req.entrynum = ino; + mdt = &nmp->nm_nandfsdev->nd_ifile_mdt; + ifile = nmp->nm_ifile_node; + vp = NTOV(ifile); + + VOP_LOCK(vp, LK_EXCLUSIVE); + error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0); + if (error) { + VOP_UNLOCK(vp, 0); + return (error); + } + + *inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index; + *bp = req.bp_entry; + VOP_UNLOCK(vp, 0); + return (0); +} + |
