From 0ec31e033f020dc83728b2c1dc1de9b3a4902eaa Mon Sep 17 00:00:00 2001 From: Joel Granados Date: Thu, 25 Jun 2026 22:38:16 +0200 Subject: [PATCH] sysctl: Add negp parameter to douintvec converter functions Updates all douintvec converter function signatures to include a bool *negp parameter. This is a preparation commit required to eventually run all converters under the same function. The negp argument will be ignored as it is not relevant for the uint type. Note that do_proc_uint_conv_pipe_maxsz in pipe.c is also modified. Signed-off-by: Joel Granados --- fs/pipe.c | 2 +- include/linux/sysctl.h | 2 +- kernel/sysctl.c | 31 ++++++++++++++++--------------- 3 files changed, 18 insertions(+), 17 deletions(-) diff --git a/fs/pipe.c b/fs/pipe.c index 429b0714ec57..8f98ca864cb4 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -1589,7 +1589,7 @@ static int u2k_pipe_maxsz(const ulong *u_ptr, uint *k_ptr) return proc_uint_u2k_conv_uop(u_ptr, k_ptr, round_pipe_size_ul); } -static int do_proc_uint_conv_pipe_maxsz(ulong *u_ptr, uint *k_ptr, +static int do_proc_uint_conv_pipe_maxsz(bool *negp, ulong *u_ptr, uint *k_ptr, int dir, const struct ctl_table *table) { return proc_uint_conv(u_ptr, k_ptr, dir, table, true, diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 2886fbceb5d6..0d406b64968a 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -102,7 +102,7 @@ int proc_douintvec_minmax(const struct ctl_table *table, int write, void *buffer size_t *lenp, loff_t *ppos); int proc_douintvec_conv(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos, - int (*conv)(unsigned long *lvalp, unsigned int *valp, + int (*conv)(bool *negp, ulong *lvalp, uint *valp, int write, const struct ctl_table *table)); int proc_uint_k2u_conv(ulong *u_ptr, const uint *k_ptr); int proc_uint_u2k_conv_uop(const ulong *u_ptr, uint *k_ptr, diff --git a/kernel/sysctl.c b/kernel/sysctl.c index e53e60213462..ef5a9c5b1d10 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -444,15 +444,15 @@ static int proc_uint_u2k_conv(const ulong *u_ptr, uint *k_ptr) return proc_uint_u2k_conv_uop(u_ptr, k_ptr, NULL); } -static int do_proc_uint_conv(ulong *u_ptr, uint *k_ptr, int dir, +static int do_proc_uint_conv(bool *negp, ulong *u_ptr, uint *k_ptr, int dir, const struct ctl_table *tbl) { return proc_uint_conv(u_ptr, k_ptr, dir, tbl, false, proc_uint_u2k_conv, proc_uint_k2u_conv); } -static int do_proc_uint_conv_minmax(ulong *u_ptr, uint *k_ptr, int dir, - const struct ctl_table *tbl) +static int do_proc_uint_conv_minmax(bool *negp, ulong *u_ptr, uint *k_ptr, + int dir, const struct ctl_table *tbl) { return proc_uint_conv(u_ptr, k_ptr, dir, tbl, true, proc_uint_u2k_conv, proc_uint_k2u_conv); @@ -643,7 +643,7 @@ static int do_proc_dointvec(const struct ctl_table *table, int dir, static int do_proc_douintvec_w(const struct ctl_table *table, void *buffer, size_t *lenp, loff_t *ppos, - int (*conv)(unsigned long *u_ptr, + int (*conv)(bool *negp, unsigned long *u_ptr, unsigned int *k_ptr, int dir, const struct ctl_table *table)) { @@ -675,7 +675,7 @@ static int do_proc_douintvec_w(const struct ctl_table *table, void *buffer, goto out_free; } - if (conv(&lval, (unsigned int *) table->data, 1, table)) { + if (conv(&neg, &lval, (unsigned int *) table->data, 1, table)) { err = -EINVAL; goto out_free; } @@ -696,17 +696,18 @@ static int do_proc_douintvec_w(const struct ctl_table *table, void *buffer, static int do_proc_douintvec_r(const struct ctl_table *table, void *buffer, size_t *lenp, loff_t *ppos, - int (*conv)(unsigned long *u_ptr, + int (*conv)(bool *negp, unsigned long *u_ptr, unsigned int *k_ptr, int dir, const struct ctl_table *table)) { unsigned long lval; int err = 0; size_t left; + bool negp; left = *lenp; - if (conv(&lval, (unsigned int *) table->data, 0, table)) { + if (conv(&negp, &lval, (unsigned int *) table->data, 0, table)) { err = -EINVAL; goto out; } @@ -726,9 +727,8 @@ static int do_proc_douintvec_r(const struct ctl_table *table, void *buffer, static int do_proc_douintvec(const struct ctl_table *table, int dir, void *buffer, size_t *lenp, loff_t *ppos, - int (*conv)(unsigned long *u_ptr, - unsigned int *k_ptr, int dir, - const struct ctl_table *table)) + int (*conv)(bool *negp, ulong *u_ptr, uint *k_ptr, + int dir, const struct ctl_table *table)) { unsigned int vleft; @@ -749,9 +749,6 @@ static int do_proc_douintvec(const struct ctl_table *table, int dir, return -EINVAL; } - if (!conv) - conv = do_proc_uint_conv; - if (SYSCTL_USER_TO_KERN(dir)) return do_proc_douintvec_w(table, buffer, lenp, ppos, conv); return do_proc_douintvec_r(table, buffer, lenp, ppos, conv); @@ -775,9 +772,13 @@ static int do_proc_douintvec(const struct ctl_table *table, int dir, */ int proc_douintvec_conv(const struct ctl_table *table, int dir, void *buffer, size_t *lenp, loff_t *ppos, - int (*conv)(unsigned long *u_ptr, unsigned int *k_ptr, + int (*conv)(bool *negp, ulong *u_ptr, uint *k_ptr, int dir, const struct ctl_table *table)) { + + if (!conv) + conv = do_proc_uint_conv; + return do_proc_douintvec(table, dir, buffer, lenp, ppos, conv); } @@ -1279,7 +1280,7 @@ int proc_douintvec_minmax(const struct ctl_table *table, int dir, int proc_douintvec_conv(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos, - int (*conv)(unsigned long *lvalp, unsigned int *valp, + int (*conv)(bool *negp, ulong *lvalp, uint *valp, int write, const struct ctl_table *table)) { return -ENOSYS;