Messages in this thread Patch in this message | | | Date | Fri, 4 Mar 2011 23:47:06 +0800 | From | Dave Young <> | Subject | [PATCH 03/04 v2] sysctl: add proc_dointvec_unsigned handler |
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Add proc_dointvec_unsigned sysctl handler for positive value cases
Signed-off-by: Dave Young <hidave.darkstar@gmail.com> --- include/linux/sysctl.h | 2 ++ kernel/sysctl.c | 26 ++++++++++++++++++++++++++ 2 files changed, 28 insertions(+)
--- linux-2.6.orig/kernel/sysctl.c 2011-03-03 11:17:21.796661240 +0800 +++ linux-2.6/kernel/sysctl.c 2011-03-03 11:17:39.126661201 +0800 @@ -2459,6 +2459,32 @@ int proc_dointvec_bool(struct ctl_table } EXPORT_SYMBOL(proc_dointvec_bool); +/** + * proc_dointvec_unsigned - read a vector of integers with positive values + * @table: the sysctl table + * @write: %TRUE if this is a write to the sysctl file + * @buffer: the user buffer + * @lenp: the size of the user buffer + * @ppos: file position + * + * Reads/writes up to table->maxlen/sizeof(unsigned int) integer + * values from/to the user buffer, treated as an ASCII string. + * + * This routine will ensure the values are positive. + * + * Returns 0 on success. + */ +int proc_dointvec_unsigned(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + struct do_proc_dointvec_minmax_conv_param param = { + .min = &zero, + }; + return do_proc_dointvec(table, write, buffer, lenp, ppos, + do_proc_dointvec_minmax_conv, ¶m); +} +EXPORT_SYMBOL(proc_dointvec_unsigned); + static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos, --- linux-2.6.orig/include/linux/sysctl.h 2011-03-03 11:16:16.000000000 +0800 +++ linux-2.6/include/linux/sysctl.h 2011-03-03 11:18:15.529994450 +0800 @@ -972,6 +972,8 @@ extern int proc_dointvec_minmax(struct c void __user *, size_t *, loff_t *); extern int proc_dointvec_bool(struct ctl_table *, int, void __user *, size_t *, loff_t *); +extern int proc_dointvec_unsigned(struct ctl_table *, int, + void __user *, size_t *, loff_t *); extern int proc_dointvec_jiffies(struct ctl_table *, int, void __user *, size_t *, loff_t *); extern int proc_dointvec_userhz_jiffies(struct ctl_table *, int,
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