cc810ee4d9
The main motivation for this change is that only Loris supports multithreading, and Loris supports dynamic thread allocation, so the number of supported threads can be implemented as a bit flag (i.e., either 1 or "at least as many as VFS has"). The ABI break obviates the need to support file system versioning at this time, and several other aspects are better implemented as flags as well. Other changes: - replace peek/bpeek test upon mount with FS flag as well; - mark libsffs as 64-bit file size capable; - remove old (3.2.1) getdents support. Change-Id: I313eace9c50ed816656c31cd47d969033d952a03
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/* 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 <fcntl.h>
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#include <string.h>
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#include <minix/com.h>
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#include <sys/stat.h>
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#include <minix/ds.h>
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#include <minix/vfsif.h>
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#include "puffs_priv.h"
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/*===========================================================================*
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* fs_readsuper *
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*===========================================================================*/
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int fs_readsuper()
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{
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struct vattr *root_va;
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fs_dev = fs_m_in.REQ_DEV;
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is_readonly_fs = (fs_m_in.REQ_FLAGS & REQ_RDONLY) ? 1 : 0;
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is_root_fs = (fs_m_in.REQ_FLAGS & REQ_ISROOT) ? 1 : 0;
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/* Open root pnode */
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global_pu->pu_pn_root->pn_count = 1;
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/* Root pnode properties */
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root_va = &global_pu->pu_pn_root->pn_va;
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fs_m_out.RES_INODE_NR = root_va->va_fileid;
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fs_m_out.RES_MODE = root_va->va_mode;
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fs_m_out.RES_FILE_SIZE_LO = root_va->va_size;
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fs_m_out.RES_UID = root_va->va_uid;
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fs_m_out.RES_GID = root_va->va_gid;
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fs_m_out.RES_FLAGS = RES_NOFLAGS;
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return(OK);
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}
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/*===========================================================================*
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* fs_mountpoint *
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*===========================================================================*/
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int fs_mountpoint()
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{
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/* This function looks up the mount point, it checks the condition whether
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* the partition can be mounted on the pnode or not.
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*/
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int r = OK;
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struct puffs_node *pn;
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pmode_t bits;
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/*
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* XXX: we assume that lookup was done first, so pnode can be found with
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* puffs_pn_nodewalk.
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*/
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if ((pn = puffs_pn_nodewalk(global_pu, 0, &fs_m_in.REQ_INODE_NR)) == NULL)
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return(EINVAL);
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if (pn->pn_mountpoint) r = EBUSY;
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/* It may not be special. */
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bits = pn->pn_va.va_mode & I_TYPE;
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if(bits == I_BLOCK_SPECIAL || bits == I_CHAR_SPECIAL) r = ENOTDIR;
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if (r == OK)
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pn->pn_mountpoint = TRUE;
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return(r);
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}
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/*===========================================================================*
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* fs_unmount *
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*===========================================================================*/
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int fs_unmount()
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{
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int error;
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/* XXX there is no information about flags, 0 should be safe enough */
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error = global_pu->pu_ops.puffs_fs_unmount(global_pu, 0);
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if (error) {
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/* XXX we can't return any error to VFS */
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lpuffs_debug("user handler failed to unmount filesystem!\
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Force unmount!\n");
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}
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fs_sync();
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/* Finish off the unmount. */
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PU_SETSTATE(global_pu, PUFFS_STATE_UNMOUNTED);
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unmountdone = TRUE;
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global_pu->pu_pn_root->pn_count--;
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return(OK);
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}
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