9f8868ffb3
Currently the xfs module init/exit code is a mess. It's farmed out over a lot of function with very little error checking. This patch makes sure we propagate all initialization failures properly and clean up after them. Various runtime initializations are replaced with compile-time initializations where possible to make this easier. The exit path is similarly consolidated. There's now split out function to create/destroy the kmem zones and alloc/free the trace buffers. I've also changed the ktrace allocations to KM_MAYFAIL and handled errors resulting from that. And yes, we really should replace the XFS_*_TRACE ifdefs with a single XFS_TRACE.. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:31354a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Niv Sardi <xaiki@sgi.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/*
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* Copyright (c) 2001-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_SYSCTL_H__
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#define __XFS_SYSCTL_H__
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#include <linux/sysctl.h>
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/*
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* Tunable xfs parameters
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*/
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typedef struct xfs_sysctl_val {
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int min;
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int val;
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int max;
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} xfs_sysctl_val_t;
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typedef struct xfs_param {
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xfs_sysctl_val_t restrict_chown;/* Root/non-root can give away files.*/
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xfs_sysctl_val_t sgid_inherit; /* Inherit S_ISGID if process' GID is
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* not a member of parent dir GID. */
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xfs_sysctl_val_t symlink_mode; /* Link creat mode affected by umask */
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xfs_sysctl_val_t panic_mask; /* bitmask to cause panic on errors. */
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xfs_sysctl_val_t error_level; /* Degree of reporting for problems */
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xfs_sysctl_val_t syncd_timer; /* Interval between xfssyncd wakeups */
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xfs_sysctl_val_t stats_clear; /* Reset all XFS statistics to zero. */
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xfs_sysctl_val_t inherit_sync; /* Inherit the "sync" inode flag. */
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xfs_sysctl_val_t inherit_nodump;/* Inherit the "nodump" inode flag. */
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xfs_sysctl_val_t inherit_noatim;/* Inherit the "noatime" inode flag. */
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xfs_sysctl_val_t xfs_buf_timer; /* Interval between xfsbufd wakeups. */
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xfs_sysctl_val_t xfs_buf_age; /* Metadata buffer age before flush. */
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xfs_sysctl_val_t inherit_nosym; /* Inherit the "nosymlinks" flag. */
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xfs_sysctl_val_t rotorstep; /* inode32 AG rotoring control knob */
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xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
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xfs_sysctl_val_t fstrm_timer; /* Filestream dir-AG assoc'n timeout. */
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} xfs_param_t;
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/*
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* xfs_error_level:
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*
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* How much error reporting will be done when internal problems are
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* encountered. These problems normally return an EFSCORRUPTED to their
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* caller, with no other information reported.
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*
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* 0 No error reports
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* 1 Report EFSCORRUPTED errors that will cause a filesystem shutdown
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* 5 Report all EFSCORRUPTED errors (all of the above errors, plus any
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* additional errors that are known to not cause shutdowns)
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*
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* xfs_panic_mask bit 0x8 turns the error reports into panics
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*/
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enum {
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/* XFS_REFCACHE_SIZE = 1 */
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/* XFS_REFCACHE_PURGE = 2 */
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XFS_RESTRICT_CHOWN = 3,
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XFS_SGID_INHERIT = 4,
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XFS_SYMLINK_MODE = 5,
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XFS_PANIC_MASK = 6,
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XFS_ERRLEVEL = 7,
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XFS_SYNCD_TIMER = 8,
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/* XFS_PROBE_DMAPI = 9 */
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/* XFS_PROBE_IOOPS = 10 */
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/* XFS_PROBE_QUOTA = 11 */
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XFS_STATS_CLEAR = 12,
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XFS_INHERIT_SYNC = 13,
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XFS_INHERIT_NODUMP = 14,
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XFS_INHERIT_NOATIME = 15,
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XFS_BUF_TIMER = 16,
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XFS_BUF_AGE = 17,
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/* XFS_IO_BYPASS = 18 */
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XFS_INHERIT_NOSYM = 19,
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XFS_ROTORSTEP = 20,
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XFS_INHERIT_NODFRG = 21,
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XFS_FILESTREAM_TIMER = 22,
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};
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extern xfs_param_t xfs_params;
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#ifdef CONFIG_SYSCTL
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extern int xfs_sysctl_register(void);
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extern void xfs_sysctl_unregister(void);
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#else
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# define xfs_sysctl_register() (0)
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# define xfs_sysctl_unregister() do { } while (0)
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#endif /* CONFIG_SYSCTL */
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#endif /* __XFS_SYSCTL_H__ */
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