132 lines
2 KiB
PHP
132 lines
2 KiB
PHP
;; File: vfs.inc
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;;
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;; Usefull links:
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;; - <https://www.cs.fsu.edu/~awang/courses/cop5611_s2024/vnode.pdf>
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;;
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;; Struc: VFS
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;;
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;; .name - Filesystem name
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;; .next - pointer to next VFS
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;; .ops - pointer to VFS function
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struc VFS {
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.name dd ?
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.next dd ?
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.ops_ptr dd ?
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}
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DEFN VFS
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;; Struc: Mount
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;;
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;; .next - address of next mount
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;; .ops_ptr - address of mount ops
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;; .vnodes -
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struc Mount {
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.next dd ?
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.ops_ptr dd ?
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.vnodes dd ?
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.flag dd ?
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.bsize dd ?
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.data dd ?
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}
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struc VFSOps {
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.mount dd ?
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.umount dd ?
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.root dd ?
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.statfs dd ?
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.sync dd ?
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.fid dd ?
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.vget dd ?
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}
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macro VNODE_TYPE name,value {
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VNODE_TYPE_#name equ value
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}
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;; Constants: vnode types
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;;
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;; VNODE_TYPE_NON - XXX
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;; VNODE_TYPE_REG - XXX
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;; VNODE_TYPE_DIR - XXX
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;; VNODE_TYPE_BLK - XXX
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;; VNODE_TYPE_CHR - XXX
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;; VNODE_TYPE_LNK - XXX
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;; VNODE_TYPE_SOCK - XXX
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;; VNODE_TYPE_BAD - XXX
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VNODE_TYPE NON, 0x0
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VNODE_TYPE REG, 0x1
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VNODE_TYPE DIR, 0x2
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VNODE_TYPE BLK, 0x3
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VNODE_TYPE CHR, 0x4
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VNODE_TYPE LNK, 0x5
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VNODE_TYPE SOCK, 0x6
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VNODE_TYPE BAD, 0x7
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;; Struc: VNode
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struc VNode {
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.flag dw ?
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.refcount dw ?
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.shlockc dw ?
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.exlockc dw ?
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.vfs dd ?
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.op dd ?
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.sock dd ?
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.vfsp dd ?
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.type db ?
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.data dd ?
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}
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struc VNodeOps {
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.open dd ?
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.close dd ?
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.rdwr dd ?
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.ioctl dd ?
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.select dd ?
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.getattr dd ?
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.setattr dd ?
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.access dd ?
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.lookup dd ?
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.create dd ?
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.remove dd ?
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.link dd ?
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.rename dd ?
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.mkdir dd ?
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.rmdir dd ?
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.readdir dd ?
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.symlink dd ?
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.readlink dd ?
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.fsync dd ?
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.inactive dd ?
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.bmap dd ?
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.strategy dd ?
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.bread dd ?
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.brelse dd ?
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}
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;; Function: vfs_register
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;;
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;; In:
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;; EAX - Pointer to VFS struct
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;;
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vfs_register:
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mov edx, [pVFS]
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mov [eax + VFS.next], edx
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mov [pVFS], eax
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mov eax, [eax + VFS.name]
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push eax
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mov eax, szMsgVFSRegister
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call klog
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pop eax
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ret
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vfs_init:
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call fatfs_init
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call stpdfs_init
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call xv6fs_init
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ret
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pVFS dd 0
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pRootFS dd 0
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szMsgVFSRegister db 'VFS: register %s', 0
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