[PATCH v6 09/12] xfs: refactor xfs_parseags()

Ian Kent
2019-10-16T00:41:36Z

Refactor xfs_parseags(), move the entire token case block to a
separate function in an attempt to highlight the code that
actually changes in converting to use the new mount api.

The only changes are what's needed to communicate the variables
dsunit, dswidth and iosizelog back to xfs_parseags().

Signed-off-by: Ian Kent <raven@themaw.net>
Reviewed-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/xfs_super.c | 290 ++++++++++++++++++++++++++++------------------------
1 file changed, 155 insertions(+), 135 deletions(-)

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index e54348be2a17..cd17e4e6b922 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -155,6 +155,156 @@ match_kstrtoint(const substring_t *s, unsigned int base, int *res)
return ret;
}

+static int
+xfs_parse_param(
+ int token,
+ char *p,
+ substring_t *args,
+ struct xfs_mount *mp,
+ int *dsunit,
+ int *dswidth,
+ uint8_t *iosizelog)
+{
+ int iosize = 0;
+
+ switch (token) {
+ case Opt_logbufs:
+ if (match_int(args, &mp->m_logbufs))
+ return -EINVAL;
+ break;
+ case Opt_logbsize:
+ if (match_kstrtoint(args, 10, &mp->m_logbsize))
+ return -EINVAL;
+ break;
+ case Opt_logdev:
+ kfree(mp->m_logname);
+ mp->m_logname = match_strdup(args);
+ if (!mp->m_logname)
+ return -ENOMEM;
+ break;
+ case Opt_rtdev:
+ kfree(mp->m_rtname);
+ mp->m_rtname = match_strdup(args);
+ if (!mp->m_rtname)
+ return -ENOMEM;
+ break;
+ case Opt_allocsize:
+ if (match_kstrtoint(args, 10, &iosize))
+ return -EINVAL;
+ *iosizelog = ffs(iosize) - 1;
+ break;
+ case Opt_grpid:
+ case Opt_bsdgroups:
+ mp->m_flags |= XFS_MOUNT_GRPID;
+ break;
+ case Opt_nogrpid:
+ case Opt_sysvgroups:
+ mp->m_flags &= ~XFS_MOUNT_GRPID;
+ break;
+ case Opt_wsync:
+ mp->m_flags |= XFS_MOUNT_WSYNC;
+ break;
+ case Opt_norecovery:
+ mp->m_flags |= XFS_MOUNT_NORECOVERY;
+ break;
+ case Opt_noalign:
+ mp->m_flags |= XFS_MOUNT_NOALIGN;
+ break;
+ case Opt_swalloc:
+ mp->m_flags |= XFS_MOUNT_SWALLOC;
+ break;
+ case Opt_sunit:
+ if (match_int(args, dsunit))
+ return -EINVAL;
+ break;
+ case Opt_swidth:
+ if (match_int(args, dswidth))
+ return -EINVAL;
+ break;
+ case Opt_inode32:
+ mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
+ break;
+ case Opt_inode64:
+ mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
+ break;
+ case Opt_nouuid:
+ mp->m_flags |= XFS_MOUNT_NOUUID;
+ break;
+ case Opt_ikeep:
+ mp->m_flags |= XFS_MOUNT_IKEEP;
+ break;
+ case Opt_noikeep:
+ mp->m_flags &= ~XFS_MOUNT_IKEEP;
+ break;
+ case Opt_largeio:
+ mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
+ break;
+ case Opt_nolargeio:
+ mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
+ break;
+ case Opt_attr2:
+ mp->m_flags |= XFS_MOUNT_ATTR2;
+ break;
+ case Opt_noattr2:
+ mp->m_flags &= ~XFS_MOUNT_ATTR2;
+ mp->m_flags |= XFS_MOUNT_NOATTR2;
+ break;
+ case Opt_filestreams:
+ mp->m_flags |= XFS_MOUNT_FILESTREAMS;
+ break;
+ case Opt_noquota:
+ mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
+ mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
+ mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
+ break;
+ case Opt_quota:
+ case Opt_uquota:
+ case Opt_usrquota:
+ mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
+ XFS_UQUOTA_ENFD);
+ break;
+ case Opt_qnoenforce:
+ case Opt_uqnoenforce:
+ mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
+ mp->m_qflags &= ~XFS_UQUOTA_ENFD;
+ break;
+ case Opt_pquota:
+ case Opt_prjquota:
+ mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
+ XFS_PQUOTA_ENFD);
+ break;
+ case Opt_pqnoenforce:
+ mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
+ mp->m_qflags &= ~XFS_PQUOTA_ENFD;
+ break;
+ case Opt_gquota:
+ case Opt_grpquota:
+ mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
+ XFS_GQUOTA_ENFD);
+ break;
+ case Opt_gqnoenforce:
+ mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
+ mp->m_qflags &= ~XFS_GQUOTA_ENFD;
+ break;
+ case Opt_discard:
+ mp->m_flags |= XFS_MOUNT_DISCARD;
+ break;
+ case Opt_nodiscard:
+ mp->m_flags &= ~XFS_MOUNT_DISCARD;
+ break;
+#ifdef CONFIG_FS_DAX
+ case Opt_dax:
+ mp->m_flags |= XFS_MOUNT_DAX;
+ break;
+#endif
+ default:
+ xfs_warn(mp, "unknown mount option [%s].", p);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
/*
* This function fills in xfs_mount_t fields based on mount args.
* Note: the superblock has _not_ yet been read in.
@@ -176,7 +326,6 @@ xfs_parseargs(
substring_t args[MAX_OPT_ARGS];
int dsunit = 0;
int dswidth = 0;
- int iosize = 0;
uint8_t iosizelog = 0;

/*
@@ -206,145 +355,16 @@ xfs_parseargs(

while ((p = strsep(&options, ",")) != NULL) {
int token;
+ int ret;

if (!*p)
continue;

token = match_token(p, tokens, args);
- switch (token) {
- case Opt_logbufs:
- if (match_int(args, &mp->m_logbufs))
- return -EINVAL;
- break;
- case Opt_logbsize:
- if (match_kstrtoint(args, 10, &mp->m_logbsize))
- return -EINVAL;
- break;
- case Opt_logdev:
- kfree(mp->m_logname);
- mp->m_logname = match_strdup(args);
- if (!mp->m_logname)
- return -ENOMEM;
- break;
- case Opt_rtdev:
- kfree(mp->m_rtname);
- mp->m_rtname = match_strdup(args);
- if (!mp->m_rtname)
- return -ENOMEM;
- break;
- case Opt_allocsize:
- if (match_kstrtoint(args, 10, &iosize))
- return -EINVAL;
- iosizelog = ffs(iosize) - 1;
- break;
- case Opt_grpid:
- case Opt_bsdgroups:
- mp->m_flags |= XFS_MOUNT_GRPID;
- break;
- case Opt_nogrpid:
- case Opt_sysvgroups:
- mp->m_flags &= ~XFS_MOUNT_GRPID;
- break;
- case Opt_wsync:
- mp->m_flags |= XFS_MOUNT_WSYNC;
- break;
- case Opt_norecovery:
- mp->m_flags |= XFS_MOUNT_NORECOVERY;
- break;
- case Opt_noalign:
- mp->m_flags |= XFS_MOUNT_NOALIGN;
- break;
- case Opt_swalloc:
- mp->m_flags |= XFS_MOUNT_SWALLOC;
- break;
- case Opt_sunit:
- if (match_int(args, &dsunit))
- return -EINVAL;
- break;
- case Opt_swidth:
- if (match_int(args, &dswidth))
- return -EINVAL;
- break;
- case Opt_inode32:
- mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
- break;
- case Opt_inode64:
- mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
- break;
- case Opt_nouuid:
- mp->m_flags |= XFS_MOUNT_NOUUID;
- break;
- case Opt_ikeep:
- mp->m_flags |= XFS_MOUNT_IKEEP;
- break;
- case Opt_noikeep:
- mp->m_flags &= ~XFS_MOUNT_IKEEP;
- break;
- case Opt_largeio:
- mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
- break;
- case Opt_nolargeio:
- mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
- break;
- case Opt_attr2:
- mp->m_flags |= XFS_MOUNT_ATTR2;
- break;
- case Opt_noattr2:
- mp->m_flags &= ~XFS_MOUNT_ATTR2;
- mp->m_flags |= XFS_MOUNT_NOATTR2;
- break;
- case Opt_filestreams:
- mp->m_flags |= XFS_MOUNT_FILESTREAMS;
- break;
- case Opt_noquota:
- mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
- mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
- mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
- break;
- case Opt_quota:
- case Opt_uquota:
- case Opt_usrquota:
- mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
- XFS_UQUOTA_ENFD);
- break;
- case Opt_qnoenforce:
- case Opt_uqnoenforce:
- mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
- mp->m_qflags &= ~XFS_UQUOTA_ENFD;
- break;
- case Opt_pquota:
- case Opt_prjquota:
- mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
- XFS_PQUOTA_ENFD);
- break;
- case Opt_pqnoenforce:
- mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
- mp->m_qflags &= ~XFS_PQUOTA_ENFD;
- break;
- case Opt_gquota:
- case Opt_grpquota:
- mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
- XFS_GQUOTA_ENFD);
- break;
- case Opt_gqnoenforce:
- mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
- mp->m_qflags &= ~XFS_GQUOTA_ENFD;
- break;
- case Opt_discard:
- mp->m_flags |= XFS_MOUNT_DISCARD;
- break;
- case Opt_nodiscard:
- mp->m_flags &= ~XFS_MOUNT_DISCARD;
- break;
-#ifdef CONFIG_FS_DAX
- case Opt_dax:
- mp->m_flags |= XFS_MOUNT_DAX;
- break;
-#endif
- default:
- xfs_warn(mp, "unknown mount option [%s].", p);
- return -EINVAL;
- }
+ ret = xfs_parse_param(token, p, args, mp,
+ &dsunit, &dswidth, &iosizelog);
+ if (ret)
+ return ret;
}

/*