958b25be50
- Revise VFS-FS protocol and update VFS/MFS/ISOFS accordingly.
- Clean up MFS by removing old, dead code (backwards compatibility is broken by
the new VFS-FS protocol, anyway) and rewrite other parts. Also, make sure all
functions have proper banners and prototypes.
- VFS should always provide a (syntactically) valid path to the FS; no need for
the FS to do sanity checks when leaving/entering mount points.
- Fix several bugs in MFS:
- Several path lookup bugs in MFS.
- A link can be too big for the path buffer.
- A mountpoint can become inaccessible when the creation of a new inode
fails, because the inode already exists and is a mountpoint.
- Introduce support for supplemental groups.
- Add test 46 to test supplemental group functionality (and removed obsolete
suppl. tests from test 2).
- Clean up VFS (not everything is done yet).
- ISOFS now opens device read-only. This makes the -r flag in the mount command
unnecessary (but will still report to be mounted read-write).
- Introduce PipeFS. PipeFS is a new FS that handles all anonymous and
named pipes. However, named pipes still reside on the (M)FS, as they are part
of the file system on disk. To make this work VFS now has a concept of
'mapped' inodes, which causes read, write, truncate and stat requests to be
redirected to the mapped FS, and all other requests to the original FS.
60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
#ifndef __VFS_FPROC_H__
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#define __VFS_FPROC_H__
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#include <sys/select.h>
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#include <minix/safecopies.h>
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/* This is the per-process information. A slot is reserved for each potential
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* process. Thus NR_PROCS must be the same as in the kernel. It is not
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* possible or even necessary to tell when a slot is free here.
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*/
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EXTERN struct fproc {
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unsigned fp_flags;
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mode_t fp_umask; /* mask set by umask system call */
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struct vnode *fp_wd; /* working directory; NULL during reboot */
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struct vnode *fp_rd; /* root directory; NULL during reboot */
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struct filp *fp_filp[OPEN_MAX];/* the file descriptor table */
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fd_set fp_filp_inuse; /* which fd's are in use? */
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uid_t fp_realuid; /* real user id */
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uid_t fp_effuid; /* effective user id */
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gid_t fp_realgid; /* real group id */
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gid_t fp_effgid; /* effective group id */
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int fp_ngroups; /* number of supplemental groups */
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gid_t fp_sgroups[NGROUPS_MAX];/* supplemental groups */
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dev_t fp_tty; /* major/minor of controlling tty */
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int fp_fd; /* place to save fd if rd/wr can't finish */
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char *fp_buffer; /* place to save buffer if rd/wr can't finish*/
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int fp_nbytes; /* place to save bytes if rd/wr can't finish */
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int fp_cum_io_partial; /* partial byte count if rd/wr can't finish */
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int fp_revived; /* set to indicate process being revived */
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endpoint_t fp_task; /* which task is proc suspended on */
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int fp_blocked_on; /* what is it blocked on */
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endpoint_t fp_ioproc; /* proc no. in suspended-on i/o message */
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cp_grant_id_t fp_grant; /* revoke this grant on unsuspend if > -1 */
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char fp_sesldr; /* true if proc is a session leader */
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char fp_execced; /* true if proc has exec()ced after fork */
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pid_t fp_pid; /* process id */
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fd_set fp_cloexec_set; /* bit map for POSIX Table 6-2 FD_CLOEXEC */
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endpoint_t fp_endpoint; /* kernel endpoint number of this process */
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} fproc[NR_PROCS];
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/* fp_flags */
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#define NO_FLAGS 0
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#define SUSP_REOPEN 1 /* Process is suspended until the reopens are
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* completed (after the restart of a driver).
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*/
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/* Field values. */
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#define NOT_REVIVING 0xC0FFEEE /* process is not being revived */
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#define REVIVING 0xDEEAD /* process is being revived from suspension */
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#define PID_FREE 0 /* process slot free */
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#endif /* __VFS_FPROC_H__ */
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