3de8d1cf6e
Because pipes have no file position. VFS maintained (file) offsets into a buffer internal to PFS and stored them in vnodes for simplicity, mixing the responsibilities of filp and vnode objects. With this patch PFS ignores the position field in REQ_READ and REQ_WRITE requests making VFS' job a lot simpler.
33 lines
1.3 KiB
C
33 lines
1.3 KiB
C
#ifndef __VFS_VNODE_H__
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#define __VFS_VNODE_H__
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EXTERN struct vnode {
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endpoint_t v_fs_e; /* FS process' endpoint number */
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endpoint_t v_mapfs_e; /* mapped FS process' endpoint number */
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ino_t v_inode_nr; /* inode number on its (minor) device */
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ino_t v_mapinode_nr; /* mapped inode number of mapped FS. */
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mode_t v_mode; /* file type, protection, etc. */
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uid_t v_uid; /* uid of inode. */
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gid_t v_gid; /* gid of inode. */
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off_t v_size; /* current file size in bytes */
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int v_ref_count; /* # times vnode used; 0 means slot is free */
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int v_fs_count; /* # reference at the underlying FS */
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int v_mapfs_count; /* # reference at the underlying mapped FS */
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#if 0
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int v_ref_check; /* for consistency checks */
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#endif
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endpoint_t v_bfs_e; /* endpoint number for the FS proces in case
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of a block special file */
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dev_t v_dev; /* device number on which the corresponding
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inode resides */
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dev_t v_sdev; /* device number for special files */
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struct vmnt *v_vmnt; /* vmnt object of the partition */
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tll_t v_lock; /* three-level-lock */
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} vnode[NR_VNODES];
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/* vnode lock types mapping */
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#define VNODE_READ TLL_READ
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#define VNODE_OPCL TLL_READSER
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#define VNODE_WRITE TLL_WRITE
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#endif
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