823e42c3e3
PUFFS file systems need to make back calls for every operation we send to them. Consequently, they cannot handle block reads and writes themselves. Instead, the root file system has to do it (for now). When the mount operation causes an FS to make a back call, AVFS now concludes that every block read and write for that FS has to go through the root file system.
27 lines
803 B
C
27 lines
803 B
C
#ifndef __VFS_VMNT_H__
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#define __VFS_VMNT_H__
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EXTERN struct vmnt {
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int m_fs_e; /* FS process' kernel endpoint */
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tll_t m_lock;
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comm_t m_comm;
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dev_t m_dev; /* device number */
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unsigned int m_flags; /* mount flags */
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struct vnode *m_mounted_on; /* vnode on which the partition is mounted */
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struct vnode *m_root_node; /* root vnode */
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char m_label[LABEL_MAX]; /* label of the file system process */
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} vmnt[NR_MNTS];
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/* vmnt flags */
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#define VMNT_READONLY 01 /* Device mounted readonly */
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#define VMNT_BACKCALL 02 /* FS did back call */
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#define VMNT_MOUNTING 04 /* Device is being mounted */
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#define VMNT_FORCEROOTBSF 010 /* Force usage of none-device */
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/* vmnt lock types mapping */
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#define VMNT_READ TLL_READ
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#define VMNT_WRITE TLL_READSER
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#define VMNT_EXCL TLL_WRITE
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#endif
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