diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-11 17:42:32 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-11 17:42:32 -0800 |
commit | b3d6524ff7956c5a898d51a18eaecb62a60a2b84 (patch) | |
tree | cc049e7ec9edd9f5a76f286e04d8db9a1caa516a /drivers/tty | |
parent | 07f80d41cf24b7e6e76cd97d420167932c9a7f82 (diff) | |
parent | 6a039eab53c01a58bfff95c78fc800ca7de27c77 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Martin Schwidefsky:
- The remaining patches for the z13 machine support: kernel build
option for z13, the cache synonym avoidance, SMT support,
compare-and-delay for spinloops and the CES5S crypto adapater.
- The ftrace support for function tracing with the gcc hotpatch option.
This touches common code Makefiles, Steven is ok with the changes.
- The hypfs file system gets an extension to access diagnose 0x0c data
in user space for performance analysis for Linux running under z/VM.
- The iucv hvc console gets wildcard spport for the user id filtering.
- The cacheinfo code is converted to use the generic infrastructure.
- Cleanup and bug fixes.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (42 commits)
s390/process: free vx save area when releasing tasks
s390/hypfs: Eliminate hypfs interval
s390/hypfs: Add diagnose 0c support
s390/cacheinfo: don't use smp_processor_id() in preemptible context
s390/zcrypt: fixed domain scanning problem (again)
s390/smp: increase maximum value of NR_CPUS to 512
s390/jump label: use different nop instruction
s390/jump label: add sanity checks
s390/mm: correct missing space when reporting user process faults
s390/dasd: cleanup profiling
s390/dasd: add locking for global_profile access
s390/ftrace: hotpatch support for function tracing
ftrace: let notrace function attribute disable hotpatching if necessary
ftrace: allow architectures to specify ftrace compile options
s390: reintroduce diag 44 calls for cpu_relax()
s390/zcrypt: Add support for new crypto express (CEX5S) adapter.
s390/zcrypt: Number of supported ap domains is not retrievable.
s390/spinlock: add compare-and-delay to lock wait loops
s390/tape: remove redundant if statement
s390/hvc_iucv: add simple wildcard matches to the iucv allow filter
...
Diffstat (limited to 'drivers/tty')
-rw-r--r-- | drivers/tty/hvc/hvc_iucv.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/drivers/tty/hvc/hvc_iucv.c b/drivers/tty/hvc/hvc_iucv.c index ea74460f3638..f78a87b07872 100644 --- a/drivers/tty/hvc/hvc_iucv.c +++ b/drivers/tty/hvc/hvc_iucv.c @@ -1,10 +1,10 @@ /* - * hvc_iucv.c - z/VM IUCV hypervisor console (HVC) device driver + * z/VM IUCV hypervisor console (HVC) device driver * * This HVC device driver provides terminal access using * z/VM IUCV communication paths. * - * Copyright IBM Corp. 2008, 2009 + * Copyright IBM Corp. 2008, 2013 * * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> */ @@ -102,6 +102,7 @@ static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES]; #define IUCV_HVC_CON_IDX (0) /* List of z/VM user ID filter entries (struct iucv_vmid_filter) */ #define MAX_VMID_FILTER (500) +#define FILTER_WILDCARD_CHAR '*' static size_t hvc_iucv_filter_size; static void *hvc_iucv_filter; static const char *hvc_iucv_filter_string; @@ -734,20 +735,31 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id) * hvc_iucv_filter_connreq() - Filter connection request based on z/VM user ID * @ipvmid: Originating z/VM user ID (right padded with blanks) * - * Returns 0 if the z/VM user ID @ipvmid is allowed to connection, otherwise - * non-zero. + * Returns 0 if the z/VM user ID that is specified with @ipvmid is permitted to + * connect, otherwise non-zero. */ static int hvc_iucv_filter_connreq(u8 ipvmid[8]) { - size_t i; + const char *wildcard, *filter_entry; + size_t i, len; /* Note: default policy is ACCEPT if no filter is set */ if (!hvc_iucv_filter_size) return 0; - for (i = 0; i < hvc_iucv_filter_size; i++) - if (0 == memcmp(ipvmid, hvc_iucv_filter + (8 * i), 8)) + for (i = 0; i < hvc_iucv_filter_size; i++) { + filter_entry = hvc_iucv_filter + (8 * i); + + /* If a filter entry contains the filter wildcard character, + * reduce the length to match the leading portion of the user + * ID only (wildcard match). Characters following the wildcard + * are ignored. + */ + wildcard = strnchr(filter_entry, 8, FILTER_WILDCARD_CHAR); + len = (wildcard) ? wildcard - filter_entry : 8; + if (0 == memcmp(ipvmid, filter_entry, len)) return 0; + } return 1; } @@ -1166,6 +1178,7 @@ static void __init hvc_iucv_destroy(struct hvc_iucv_private *priv) /** * hvc_iucv_parse_filter() - Parse filter for a single z/VM user ID * @filter: String containing a comma-separated list of z/VM user IDs + * @dest: Location where to store the parsed z/VM user ID */ static const char *hvc_iucv_parse_filter(const char *filter, char *dest) { @@ -1188,6 +1201,10 @@ static const char *hvc_iucv_parse_filter(const char *filter, char *dest) if (filter[len - 1] == '\n') len--; + /* prohibit filter entries containing the wildcard character only */ + if (len == 1 && *filter == FILTER_WILDCARD_CHAR) + return ERR_PTR(-EINVAL); + if (len > 8) return ERR_PTR(-EINVAL); |