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xfs: expose errortag knobs via sysfs
Creates a /sys/fs/xfs/$dev/errortag/ directory to control the errortag values directly. This enables us to control the randomness values, rather than having to accept the defaults. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
This commit is contained in:
Darrick J. Wong
parent
31965ef348
commit
c684010115
@ -22,6 +22,7 @@
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_error.h"
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#include "xfs_sysfs.h"
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#ifdef DEBUG
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@ -56,6 +57,145 @@ static unsigned int xfs_errortag_random_default[] = {
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XFS_RANDOM_AG_RESV_CRITICAL,
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};
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struct xfs_errortag_attr {
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struct attribute attr;
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unsigned int tag;
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};
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static inline struct xfs_errortag_attr *
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to_attr(struct attribute *attr)
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{
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return container_of(attr, struct xfs_errortag_attr, attr);
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}
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static inline struct xfs_mount *
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to_mp(struct kobject *kobject)
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{
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struct xfs_kobj *kobj = to_kobj(kobject);
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return container_of(kobj, struct xfs_mount, m_errortag_kobj);
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}
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STATIC ssize_t
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xfs_errortag_attr_store(
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struct kobject *kobject,
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struct attribute *attr,
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const char *buf,
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size_t count)
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{
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struct xfs_mount *mp = to_mp(kobject);
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struct xfs_errortag_attr *xfs_attr = to_attr(attr);
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int ret;
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unsigned int val;
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if (strcmp(buf, "default") == 0) {
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val = xfs_errortag_random_default[xfs_attr->tag];
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} else {
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ret = kstrtouint(buf, 0, &val);
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if (ret)
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return ret;
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}
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ret = xfs_errortag_set(mp, xfs_attr->tag, val);
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if (ret)
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return ret;
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return count;
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}
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STATIC ssize_t
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xfs_errortag_attr_show(
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struct kobject *kobject,
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struct attribute *attr,
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char *buf)
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{
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struct xfs_mount *mp = to_mp(kobject);
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struct xfs_errortag_attr *xfs_attr = to_attr(attr);
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return snprintf(buf, PAGE_SIZE, "%u\n",
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xfs_errortag_get(mp, xfs_attr->tag));
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}
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static const struct sysfs_ops xfs_errortag_sysfs_ops = {
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.show = xfs_errortag_attr_show,
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.store = xfs_errortag_attr_store,
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};
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#define XFS_ERRORTAG_ATTR_RW(_name, _tag) \
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static struct xfs_errortag_attr xfs_errortag_attr_##_name = { \
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.attr = {.name = __stringify(_name), \
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.mode = VERIFY_OCTAL_PERMISSIONS(S_IWUSR | S_IRUGO) }, \
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.tag = (_tag), \
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}
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#define XFS_ERRORTAG_ATTR_LIST(_name) &xfs_errortag_attr_##_name.attr
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XFS_ERRORTAG_ATTR_RW(noerror, XFS_ERRTAG_NOERROR);
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XFS_ERRORTAG_ATTR_RW(iflush1, XFS_ERRTAG_IFLUSH_1);
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XFS_ERRORTAG_ATTR_RW(iflush2, XFS_ERRTAG_IFLUSH_2);
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XFS_ERRORTAG_ATTR_RW(iflush3, XFS_ERRTAG_IFLUSH_3);
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XFS_ERRORTAG_ATTR_RW(iflush4, XFS_ERRTAG_IFLUSH_4);
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XFS_ERRORTAG_ATTR_RW(iflush5, XFS_ERRTAG_IFLUSH_5);
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XFS_ERRORTAG_ATTR_RW(iflush6, XFS_ERRTAG_IFLUSH_6);
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XFS_ERRORTAG_ATTR_RW(dareadbuf, XFS_ERRTAG_DA_READ_BUF);
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XFS_ERRORTAG_ATTR_RW(btree_chk_lblk, XFS_ERRTAG_BTREE_CHECK_LBLOCK);
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XFS_ERRORTAG_ATTR_RW(btree_chk_sblk, XFS_ERRTAG_BTREE_CHECK_SBLOCK);
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XFS_ERRORTAG_ATTR_RW(readagf, XFS_ERRTAG_ALLOC_READ_AGF);
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XFS_ERRORTAG_ATTR_RW(readagi, XFS_ERRTAG_IALLOC_READ_AGI);
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XFS_ERRORTAG_ATTR_RW(itobp, XFS_ERRTAG_ITOBP_INOTOBP);
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XFS_ERRORTAG_ATTR_RW(iunlink, XFS_ERRTAG_IUNLINK);
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XFS_ERRORTAG_ATTR_RW(iunlinkrm, XFS_ERRTAG_IUNLINK_REMOVE);
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XFS_ERRORTAG_ATTR_RW(dirinovalid, XFS_ERRTAG_DIR_INO_VALIDATE);
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XFS_ERRORTAG_ATTR_RW(bulkstat, XFS_ERRTAG_BULKSTAT_READ_CHUNK);
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XFS_ERRORTAG_ATTR_RW(logiodone, XFS_ERRTAG_IODONE_IOERR);
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XFS_ERRORTAG_ATTR_RW(stratread, XFS_ERRTAG_STRATREAD_IOERR);
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XFS_ERRORTAG_ATTR_RW(stratcmpl, XFS_ERRTAG_STRATCMPL_IOERR);
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XFS_ERRORTAG_ATTR_RW(diowrite, XFS_ERRTAG_DIOWRITE_IOERR);
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XFS_ERRORTAG_ATTR_RW(bmapifmt, XFS_ERRTAG_BMAPIFORMAT);
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XFS_ERRORTAG_ATTR_RW(free_extent, XFS_ERRTAG_FREE_EXTENT);
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XFS_ERRORTAG_ATTR_RW(rmap_finish_one, XFS_ERRTAG_RMAP_FINISH_ONE);
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XFS_ERRORTAG_ATTR_RW(refcount_continue_update, XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE);
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XFS_ERRORTAG_ATTR_RW(refcount_finish_one, XFS_ERRTAG_REFCOUNT_FINISH_ONE);
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XFS_ERRORTAG_ATTR_RW(bmap_finish_one, XFS_ERRTAG_BMAP_FINISH_ONE);
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XFS_ERRORTAG_ATTR_RW(ag_resv_critical, XFS_ERRTAG_AG_RESV_CRITICAL);
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static struct attribute *xfs_errortag_attrs[] = {
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XFS_ERRORTAG_ATTR_LIST(noerror),
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XFS_ERRORTAG_ATTR_LIST(iflush1),
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XFS_ERRORTAG_ATTR_LIST(iflush2),
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XFS_ERRORTAG_ATTR_LIST(iflush3),
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XFS_ERRORTAG_ATTR_LIST(iflush4),
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XFS_ERRORTAG_ATTR_LIST(iflush5),
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XFS_ERRORTAG_ATTR_LIST(iflush6),
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XFS_ERRORTAG_ATTR_LIST(dareadbuf),
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XFS_ERRORTAG_ATTR_LIST(btree_chk_lblk),
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XFS_ERRORTAG_ATTR_LIST(btree_chk_sblk),
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XFS_ERRORTAG_ATTR_LIST(readagf),
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XFS_ERRORTAG_ATTR_LIST(readagi),
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XFS_ERRORTAG_ATTR_LIST(itobp),
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XFS_ERRORTAG_ATTR_LIST(iunlink),
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XFS_ERRORTAG_ATTR_LIST(iunlinkrm),
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XFS_ERRORTAG_ATTR_LIST(dirinovalid),
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XFS_ERRORTAG_ATTR_LIST(bulkstat),
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XFS_ERRORTAG_ATTR_LIST(logiodone),
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XFS_ERRORTAG_ATTR_LIST(stratread),
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XFS_ERRORTAG_ATTR_LIST(stratcmpl),
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XFS_ERRORTAG_ATTR_LIST(diowrite),
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XFS_ERRORTAG_ATTR_LIST(bmapifmt),
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XFS_ERRORTAG_ATTR_LIST(free_extent),
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XFS_ERRORTAG_ATTR_LIST(rmap_finish_one),
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XFS_ERRORTAG_ATTR_LIST(refcount_continue_update),
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XFS_ERRORTAG_ATTR_LIST(refcount_finish_one),
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XFS_ERRORTAG_ATTR_LIST(bmap_finish_one),
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XFS_ERRORTAG_ATTR_LIST(ag_resv_critical),
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NULL,
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};
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struct kobj_type xfs_errortag_ktype = {
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.release = xfs_sysfs_release,
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.sysfs_ops = &xfs_errortag_sysfs_ops,
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.default_attrs = xfs_errortag_attrs,
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};
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int
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xfs_errortag_init(
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struct xfs_mount *mp)
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@ -64,13 +204,16 @@ xfs_errortag_init(
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KM_SLEEP | KM_MAYFAIL);
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if (!mp->m_errortag)
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return -ENOMEM;
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return 0;
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return xfs_sysfs_init(&mp->m_errortag_kobj, &xfs_errortag_ktype,
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&mp->m_kobj, "errortag");
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}
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void
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xfs_errortag_del(
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struct xfs_mount *mp)
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{
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xfs_sysfs_del(&mp->m_errortag_kobj);
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kmem_free(mp->m_errortag);
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}
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@ -95,6 +238,17 @@ xfs_errortag_test(
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return true;
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}
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int
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xfs_errortag_get(
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struct xfs_mount *mp,
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unsigned int error_tag)
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{
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if (error_tag >= XFS_ERRTAG_MAX)
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return -EINVAL;
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return mp->m_errortag[error_tag];
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}
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int
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xfs_errortag_set(
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struct xfs_mount *mp,
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@ -138,6 +138,7 @@ extern bool xfs_errortag_test(struct xfs_mount *mp, const char *expression,
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#define XFS_TEST_ERROR(expr, mp, tag, rf) \
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((expr) || xfs_errortag_test((mp), #expr, __FILE__, __LINE__, (tag)))
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extern int xfs_errortag_get(struct xfs_mount *mp, unsigned int error_tag);
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extern int xfs_errortag_set(struct xfs_mount *mp, unsigned int error_tag,
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unsigned int tag_value);
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extern int xfs_errortag_add(struct xfs_mount *mp, unsigned int error_tag);
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@ -204,6 +204,7 @@ typedef struct xfs_mount {
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* error triggers. 1 = always, 2 = half the time, etc.
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*/
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unsigned int *m_errortag;
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struct xfs_kobj m_errortag_kobj;
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/*
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* DEBUG mode instrumentation to test and/or trigger delayed allocation
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