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_CONREQS = 1;
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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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mode_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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