13ef7f1f38
file descriptor passing, PFS does some back calls to VFS. For example, to verify the validity of a path provided by a process and to tell VFS it must copy file descriptors from one process to another.
40 lines
1.8 KiB
C
40 lines
1.8 KiB
C
/* EXTERN should be extern except for the table file */
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#ifdef _TABLE
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#undef EXTERN
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#define EXTERN
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#endif
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/* File System global variables */
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EXTERN struct fproc *fp; /* pointer to caller's fproc struct */
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EXTERN int super_user; /* 1 if caller is super_user, else 0 */
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EXTERN int susp_count; /* number of procs suspended on pipe */
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EXTERN int nr_locks; /* number of locks currently in place */
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EXTERN int reviving; /* number of pipe processes to be revived */
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EXTERN dev_t root_dev; /* device number of the root device */
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EXTERN int ROOT_FS_E; /* kernel endpoint of the root FS proc */
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EXTERN int last_login_fs_e; /* endpoint of the FS proc that logged in
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before the corresponding mount request */
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EXTERN u32_t system_hz; /* system clock frequency. */
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/* The parameters of the call are kept here. */
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EXTERN message m_in; /* the input message itself */
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EXTERN message m_out; /* the output message used for reply */
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EXTERN int who_p, who_e; /* caller's proc number, endpoint */
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EXTERN int call_nr; /* system call number */
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EXTERN message mount_m_in; /* the input message for a mount request */
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EXTERN endpoint_t mount_fs_e; /* endpoint of file system to mount */
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EXTERN char mount_label[LABEL_MAX]; /* label of file system to mount */
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EXTERN char user_fullpath[PATH_MAX+1]; /* storage for user path name */
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/* The following variables are used for returning results to the caller. */
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EXTERN int err_code; /* temporary storage for error number */
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/* Data initialized elsewhere. */
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extern _PROTOTYPE (int (*call_vec[]), (void) ); /* sys call table */
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extern _PROTOTYPE (int (*pfs_call_vec[]), (void) ); /* pfs callback table */
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extern char dot1[2]; /* dot1 (&dot1[0]) and dot2 (&dot2[0]) have a special */
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extern char dot2[3]; /* meaning to search_dir: no access permission check. */
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