289b04677a
This obviates the need for several file system implementations to remember the device on which they are mounted. Change-Id: Ida8325cf4bcf072e61761cfee34e3f7ed2d750b9
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/* This file contains open file and directory handle management functions.
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*
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* The entry points into this file are:
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* get_handle open a handle for an inode and store the handle
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* put_handle close any handles associated with an inode
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*
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* Created:
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* April 2009 (D.C. van Moolenbroek)
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*/
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#include "inc.h"
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#include <fcntl.h>
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/*===========================================================================*
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* get_handle *
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*===========================================================================*/
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int get_handle(struct inode *ino)
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{
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/* Get an open file or directory handle for an inode.
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*/
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char path[PATH_MAX];
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int r;
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/* If we don't have a file handle yet, try to open the file now. */
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if (ino->i_flags & I_HANDLE)
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return OK;
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if ((r = verify_inode(ino, path, NULL)) != OK)
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return r;
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if (IS_DIR(ino)) {
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r = sffs_table->t_opendir(path, &ino->i_dir);
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}
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else {
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if (!read_only)
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r = sffs_table->t_open(path, O_RDWR, 0, &ino->i_file);
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/* Protection or mount status might prevent us from writing. With the
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* information that we have available, this is the best we can do..
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*/
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if (read_only || r != OK)
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r = sffs_table->t_open(path, O_RDONLY, 0, &ino->i_file);
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}
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if (r != OK)
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return r;
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ino->i_flags |= I_HANDLE;
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return OK;
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}
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/*===========================================================================*
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* put_handle *
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*===========================================================================*/
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void put_handle(struct inode *ino)
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{
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/* Close an open file or directory handle associated with an inode.
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*/
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int r;
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if (!(ino->i_flags & I_HANDLE))
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return;
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/* We ignore any errors here, because we can't deal with them anyway. */
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if (IS_DIR(ino))
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r = sffs_table->t_closedir(ino->i_dir);
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else
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r = sffs_table->t_close(ino->i_file);
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if (r != OK)
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printf("%s: put_handle: handle close operation returned %d\n",
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sffs_name, r);
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ino->i_flags &= ~I_HANDLE;
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}
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