289b04677a
This obviates the need for several file system implementations to remember the device on which they are mounted. Change-Id: Ida8325cf4bcf072e61761cfee34e3f7ed2d750b9
91 lines
2.3 KiB
C
91 lines
2.3 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/vfsif.h>
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#include "puffs_priv.h"
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/*===========================================================================*
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* fs_mount *
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*===========================================================================*/
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int fs_mount(dev_t __unused dev, unsigned int flags,
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struct fsdriver_node *root_node, unsigned int *res_flags)
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{
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struct vattr *root_va;
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is_readonly_fs = !!(flags & REQ_RDONLY);
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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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root_node->fn_ino_nr = root_va->va_fileid;
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root_node->fn_mode = root_va->va_mode;
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root_node->fn_size = root_va->va_size;
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root_node->fn_uid = root_va->va_uid;
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root_node->fn_gid = root_va->va_gid;
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root_node->fn_dev = NO_DEV;
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*res_flags = RES_NOFLAGS;
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mounted = TRUE;
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return(OK);
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}
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/*===========================================================================*
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* fs_mountpt *
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*===========================================================================*/
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int fs_mountpt(ino_t ino_nr)
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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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if ((pn = puffs_pn_nodewalk(global_pu, 0, &ino_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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void fs_unmount(void)
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{
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int error;
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/* Always force unmounting, as VFS will not tolerate failure. */
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error = global_pu->pu_ops.puffs_fs_unmount(global_pu, MNT_FORCE);
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if (error) {
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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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mounted = FALSE;
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global_pu->pu_pn_root->pn_count--;
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}
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