490e0de548
Import libpuffs and our port of libpuffs. The port was done as part of GSoC 2011 FUSE project, done by Evgeniy Ivanov. The librefuse import did not require any porting efforts. Libpuffs has been modified to understand our VFS-FS protocol and translate between that and PUFFS. As an example that it works, fuse-ntfs-3g from pkgsrc can be compiled and used to mount ntfs partitions: mount -t ntfs-3g <device> <mountpoint> FUSE only works with the asynchronous version of VFS. See <docs/UPDATING> on how to run AVFS. This patch further includes some changes to mount(1) and mount(2) so it's possible to use file systems provided by pkgsrc (note: manual modifications to /etc/system.conf are still needed. There has been made an exception for fuse-ntfs-3g, so it already as an entry).
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* Created (MFS based):
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* June 2011 (Evgeniy Ivanov)
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*/
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#include "fs.h"
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#include <string.h>
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#include <assert.h>
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#include <minix/vfsif.h>
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#include "puffs.h"
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#include "puffs_priv.h"
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void release_node(struct puffs_usermount *pu, struct puffs_node *pn)
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{
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assert(pn->pn_count == 0);
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/* Required if puffs_node_reclaim() decides to leave node in the list */
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pn->pn_mountpoint = FALSE;
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if (pu->pu_ops.puffs_node_reclaim) {
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if (global_pu->pu_ops.puffs_node_reclaim(global_pu, pn) != 0)
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lpuffs_debug("Warning: reclaim failed\n");
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} else {
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puffs_pn_put(pn);
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}
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}
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/*===========================================================================*
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* fs_putnode *
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*===========================================================================*/
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PUBLIC int fs_putnode(void)
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{
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/* Find the pnode specified by the request message and decrease its counter.
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* Release unused pnode.
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*/
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struct puffs_node *pn;
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int count = fs_m_in.REQ_COUNT;
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ino_t inum = fs_m_in.REQ_INODE_NR;
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if ((pn = puffs_pn_nodewalk(global_pu, 0, &inum)) == NULL) {
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/* XXX Probably removed from the list, see puffs_pn_remove() */
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struct puffs_node *pn_cur, *pn_next;
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pn_cur = LIST_FIRST(&global_pu->pu_pnode_removed_lst);
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while (pn_cur) {
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pn_next = LIST_NEXT(pn_cur, pn_entries);
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if (pn_cur->pn_va.va_fileid == inum) {
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pn = pn_cur;
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break;
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}
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pn_cur = pn_next;
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}
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}
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if (pn == NULL) {
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lpuffs_debug("%s:%d putnode: pnode #%ld dev: %d not found\n", __FILE__,
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__LINE__, inum, fs_dev);
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panic("fs_putnode failed");
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}
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if (count <= 0) {
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lpuffs_debug("%s:%d putnode: bad value for count: %d\n", __FILE__,
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__LINE__, count);
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panic("fs_putnode failed");
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} else if (pn->pn_count == 0) {
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/* FUSE fs might store in the list pnodes, which we hasn't
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* open, this means we got put request for file,
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* which wasn't opened by VFS.
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*/
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lpuffs_debug("%s:%d putnode: pn_count already zero\n", __FILE__,
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__LINE__);
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panic("fs_putnode failed");
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} else if (count > pn->pn_count) {
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struct puffs_node *pn_cur, *pn_next;
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struct puffs_usermount *pu = global_pu;
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ino_t ino = pn->pn_va.va_fileid;
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pn_cur = LIST_FIRST(&pu->pu_pnodelst);
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lpuffs_debug("inum count path polen hash\n");
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while (pn_cur) {
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pn_next = LIST_NEXT(pn_cur, pn_entries);
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if (pn_cur->pn_va.va_fileid == ino) {
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lpuffs_debug("%ld: %d %s %u %u\n", ino, pn_cur->pn_count,
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pn_cur->pn_po.po_path,
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pn_cur->pn_po.po_len,
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pn_cur->pn_po.po_hash);
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}
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pn_cur = pn_next;
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}
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lpuffs_debug("%s:%d putnode: count too high: %d > %d\n", __FILE__,
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__LINE__, count, pn->pn_count);
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panic("fs_putnode failed");
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}
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pn->pn_count -= count;
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if (pn->pn_count == 0)
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release_node(global_pu, pn);
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return(OK);
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}
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