diff options
Diffstat (limited to 'sys/compat/lindebugfs/lindebugfs.c')
| -rw-r--r-- | sys/compat/lindebugfs/lindebugfs.c | 421 |
1 files changed, 378 insertions, 43 deletions
diff --git a/sys/compat/lindebugfs/lindebugfs.c b/sys/compat/lindebugfs/lindebugfs.c index cbfdfbbce876..e63c31cee1d7 100644 --- a/sys/compat/lindebugfs/lindebugfs.c +++ b/sys/compat/lindebugfs/lindebugfs.c @@ -1,5 +1,5 @@ /*- - * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2016-2018, Matthew Macy <mmacy@freebsd.org> * @@ -26,9 +26,6 @@ * */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - #include <sys/param.h> #include <sys/systm.h> #include <sys/queue.h> @@ -69,9 +66,10 @@ __FBSDID("$FreeBSD$"); #include <compat/linux/linux_util.h> #include <fs/pseudofs/pseudofs.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> +#include <asm/atomic.h> #include <linux/compat.h> +#include <linux/debugfs.h> +#include <linux/fs.h> MALLOC_DEFINE(M_DFSINT, "debugfsint", "Linux debugfs internal"); @@ -118,27 +116,17 @@ debugfs_fill(PFS_FILL_ARGS) { struct dentry_meta *d; struct linux_file lf = {}; - struct seq_file *sf; struct vnode vn; - void *buf; + char *buf; int rc; - size_t len; - off_t off; - - d = pn->pn_data; + off_t off = 0; if ((rc = linux_set_current_flags(curthread, M_NOWAIT))) return (rc); + + d = pn->pn_data; vn.v_data = d->dm_data; - if (uio->uio_rw == UIO_READ) { - buf = uio->uio_iov[0].iov_base; - len = min(uio->uio_iov[0].iov_len, uio->uio_resid); - } else { - sbuf_finish(sb); - buf = sbuf_data(sb); - len = sbuf_len(sb); - } - off = 0; + rc = d->dm_fops->open(&vn, &lf); if (rc < 0) { #ifdef INVARIANTS @@ -146,19 +134,23 @@ debugfs_fill(PFS_FILL_ARGS) #endif return (-rc); } - sf = lf.private_data; - sf->buf = sb; - if (uio->uio_rw == UIO_READ) { - if (d->dm_fops->read) - rc = d->dm_fops->read(&lf, NULL, len, &off); - else - rc = -ENODEV; - } else { - if (d->dm_fops->write) - rc = d->dm_fops->write(&lf, buf, len, &off); - else - rc = -ENODEV; + + rc = -ENODEV; + if (uio->uio_rw == UIO_READ && d->dm_fops->read) { + rc = -ENOMEM; + buf = (char *) malloc(sb->s_size, M_DFSINT, M_ZERO | M_NOWAIT); + if (buf != NULL) { + rc = d->dm_fops->read(&lf, buf, sb->s_size, &off); + if (rc > 0) + sbuf_bcpy(sb, buf, strlen(buf)); + + free(buf, M_DFSINT); + } + } else if (uio->uio_rw == UIO_WRITE && d->dm_fops->write) { + sbuf_finish(sb); + rc = d->dm_fops->write(&lf, sbuf_data(sb), sbuf_len(sb), &off); } + if (d->dm_fops->release) d->dm_fops->release(&vn, &lf); else @@ -185,8 +177,8 @@ debugfs_fill_data(PFS_FILL_ARGS) struct dentry * debugfs_create_file(const char *name, umode_t mode, - struct dentry *parent, void *data, - const struct file_operations *fops) + struct dentry *parent, void *data, + const struct file_operations *fops) { struct dentry_meta *dm; struct dentry *dnode; @@ -219,6 +211,54 @@ debugfs_create_file(const char *name, umode_t mode, } struct dentry * +debugfs_create_file_size(const char *name, umode_t mode, + struct dentry *parent, void *data, + const struct file_operations *fops, + loff_t file_size __unused) +{ + + return debugfs_create_file(name, mode, parent, data, fops); +} + +/* + * NOTE: Files created with the _unsafe moniker will not be protected from + * debugfs core file removals. It is the responsibility of @fops to protect + * its file using debugfs_file_get() and debugfs_file_put(). + * + * FreeBSD's LinuxKPI lindebugfs does not perform file removals at the time + * of writing. Therefore there is no difference between functions with _unsafe + * and functions without _unsafe when using lindebugfs. Functions with _unsafe + * exist only for Linux compatibility. + */ +struct dentry * +debugfs_create_file_unsafe(const char *name, umode_t mode, + struct dentry *parent, void *data, + const struct file_operations *fops) +{ + + return (debugfs_create_file(name, mode, parent, data, fops)); +} + +struct dentry * +debugfs_create_mode_unsafe(const char *name, umode_t mode, + struct dentry *parent, void *data, + const struct file_operations *fops, + const struct file_operations *fops_ro, + const struct file_operations *fops_wo) +{ + umode_t read = mode & S_IRUGO; + umode_t write = mode & S_IWUGO; + + if (read && !write) + return (debugfs_create_file_unsafe(name, mode, parent, data, fops_ro)); + + if (write && !read) + return (debugfs_create_file_unsafe(name, mode, parent, data, fops_wo)); + + return (debugfs_create_file_unsafe(name, mode, parent, data, fops)); +} + +struct dentry * debugfs_create_dir(const char *name, struct dentry *parent) { struct dentry_meta *dm; @@ -247,7 +287,7 @@ debugfs_create_dir(const char *name, struct dentry *parent) struct dentry * debugfs_create_symlink(const char *name, struct dentry *parent, - const char *dest) + const char *dest) { struct dentry_meta *dm; struct dentry *dnode; @@ -300,7 +340,305 @@ debugfs_remove_recursive(struct dentry *dnode) } static int -debugfs_init(PFS_INIT_ARGS) +debugfs_bool_get(void *data, uint64_t *ullval) +{ + bool *bval = data; + + if (*bval) + *ullval = 1; + else + *ullval = 0; + + return (0); +} + +static int +debugfs_bool_set(void *data, uint64_t ullval) +{ + bool *bval = data; + + if (ullval) + *bval = 1; + else + *bval = 0; + + return (0); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_bool, debugfs_bool_get, debugfs_bool_set, "%llu\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_bool_ro, debugfs_bool_get, NULL, "%llu\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_bool_wo, NULL, debugfs_bool_set, "%llu\n"); + +void +debugfs_create_bool(const char *name, umode_t mode, struct dentry *parent, bool *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_bool, + &fops_bool_ro, &fops_bool_wo); +} + + +static int +debugfs_u8_get(void *data, uint64_t *value) +{ + uint8_t *u8data = data; + *value = *u8data; + return (0); +} + +static int +debugfs_u8_set(void *data, uint64_t value) +{ + uint8_t *u8data = data; + *u8data = (uint8_t)value; + return (0); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_u8, debugfs_u8_get, debugfs_u8_set, "%u\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_u8_ro, debugfs_u8_get, NULL, "%u\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_u8_wo, NULL, debugfs_u8_set, "%u\n"); + +void +debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent, uint8_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8, + &fops_u8_ro, &fops_u8_wo); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_x8, debugfs_u8_get, debugfs_u8_set, "0x%016llx\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_x8_ro, debugfs_u8_get, NULL, "0x%016llx\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_x8_wo, NULL, debugfs_u8_set, "0x%016llx\n"); + +void +debugfs_create_x8(const char *name, umode_t mode, struct dentry *parent, uint8_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x8, + &fops_x8_ro, &fops_x8_wo); +} + + +static int +debugfs_u16_get(void *data, uint64_t *value) +{ + uint16_t *u16data = data; + *value = *u16data; + return (0); +} + +static int +debugfs_u16_set(void *data, uint64_t value) +{ + uint16_t *u16data = data; + *u16data = (uint16_t)value; + return (0); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_u16, debugfs_u16_get, debugfs_u16_set, "%u\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_u16_ro, debugfs_u16_get, NULL, "%u\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_u16_wo, NULL, debugfs_u16_set, "%u\n"); + +void +debugfs_create_u16(const char *name, umode_t mode, struct dentry *parent, uint16_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u16, + &fops_u16_ro, &fops_u16_wo); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_x16, debugfs_u16_get, debugfs_u16_set, "0x%016llx\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_x16_ro, debugfs_u16_get, NULL, "0x%016llx\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_x16_wo, NULL, debugfs_u16_set, "0x%016llx\n"); + +void +debugfs_create_x16(const char *name, umode_t mode, struct dentry *parent, uint16_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x16, + &fops_x16_ro, &fops_x16_wo); +} + + +static int +debugfs_u32_get(void *data, uint64_t *value) +{ + uint32_t *u32data = data; + *value = *u32data; + return (0); +} + +static int +debugfs_u32_set(void *data, uint64_t value) +{ + uint32_t *u32data = data; + *u32data = (uint32_t)value; + return (0); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_u32, debugfs_u32_get, debugfs_u32_set, "%u\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_u32_ro, debugfs_u32_get, NULL, "%u\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_u32_wo, NULL, debugfs_u32_set, "%u\n"); + +void +debugfs_create_u32(const char *name, umode_t mode, struct dentry *parent, uint32_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u32, + &fops_u32_ro, &fops_u32_wo); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_x32, debugfs_u32_get, debugfs_u32_set, "0x%016llx\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_x32_ro, debugfs_u32_get, NULL, "0x%016llx\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_x32_wo, NULL, debugfs_u32_set, "0x%016llx\n"); + +void +debugfs_create_x32(const char *name, umode_t mode, struct dentry *parent, uint32_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x32, + &fops_x32_ro, &fops_x32_wo); +} + + +static int +debugfs_u64_get(void *data, uint64_t *value) +{ + uint64_t *u64data = data; + *value = *u64data; + return (0); +} + +static int +debugfs_u64_set(void *data, uint64_t value) +{ + uint64_t *u64data = data; + *u64data = (uint64_t)value; + return (0); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_u64, debugfs_u64_get, debugfs_u64_set, "%u\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_u64_ro, debugfs_u64_get, NULL, "%u\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%u\n"); + +void +debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent, uint64_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64, + &fops_u64_ro, &fops_u64_wo); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_x64, debugfs_u64_get, debugfs_u64_set, "0x%016llx\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_x64_ro, debugfs_u64_get, NULL, "0x%016llx\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_x64_wo, NULL, debugfs_u64_set, "0x%016llx\n"); + +void +debugfs_create_x64(const char *name, umode_t mode, struct dentry *parent, uint64_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x64, + &fops_x64_ro, &fops_x64_wo); +} + + +static int +debugfs_ulong_get(void *data, uint64_t *value) +{ + uint64_t *uldata = data; + *value = *uldata; + return (0); +} + +static int +debugfs_ulong_set(void *data, uint64_t value) +{ + uint64_t *uldata = data; + *uldata = value; + return (0); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_ulong, debugfs_ulong_get, debugfs_ulong_set, "%llu\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_ulong_ro, debugfs_ulong_get, NULL, "%llu\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_ulong_wo, NULL, debugfs_ulong_set, "%llu\n"); + +void +debugfs_create_ulong(const char *name, umode_t mode, struct dentry *parent, unsigned long *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_ulong, + &fops_ulong_ro, &fops_ulong_wo); +} + + +static int +debugfs_atomic_t_get(void *data, uint64_t *value) +{ + atomic_t *atomic_data = data; + *value = atomic_read(atomic_data); + return (0); +} + +static int +debugfs_atomic_t_set(void *data, uint64_t value) +{ + atomic_t *atomic_data = data; + atomic_set(atomic_data, (int)value); + return (0); +} + +DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t, debugfs_atomic_t_get, debugfs_atomic_t_set, "%d\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_ro, debugfs_atomic_t_get, NULL, "%d\n"); +DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_wo, NULL, debugfs_atomic_t_set, "%d\n"); + +void +debugfs_create_atomic_t(const char *name, umode_t mode, struct dentry *parent, atomic_t *value) +{ + + debugfs_create_mode_unsafe(name, mode, parent, value, &fops_atomic_t, + &fops_atomic_t_ro, &fops_atomic_t_wo); +} + + +static ssize_t +fops_blob_read(struct file *filp, char __user *ubuf, size_t read_size, loff_t *ppos) +{ + struct debugfs_blob_wrapper *blob; + + blob = filp->private_data; + if (blob == NULL) + return (-EINVAL); + if (blob->size == 0 || blob->data == NULL) + return (-EINVAL); + + return (simple_read_from_buffer(ubuf, read_size, ppos, blob->data, blob->size)); +} + +static int +fops_blob_open(struct inode *inode, struct file *filp) +{ + + return (simple_open(inode, filp)); +} + +static const struct file_operations __fops_blob_ro = { + .owner = THIS_MODULE, + .open = fops_blob_open, + .read = fops_blob_read, + .llseek = no_llseek +}; + +struct dentry * +debugfs_create_blob(const char *name, umode_t mode, struct dentry *parent, + struct debugfs_blob_wrapper *value) +{ + /* Blobs are read-only. */ + return (debugfs_create_file(name, mode & 0444, parent, value, &__fops_blob_ro)); +} + + +static int +lindebugfs_init(PFS_INIT_ARGS) { debugfs_root = pi->pi_root; @@ -311,14 +649,11 @@ debugfs_init(PFS_INIT_ARGS) } static int -debugfs_uninit(PFS_INIT_ARGS) +lindebugfs_uninit(PFS_INIT_ARGS) { + return (0); } -#ifdef PR_ALLOW_MOUNT_LINSYSFS -PSEUDOFS(debugfs, 1, PR_ALLOW_MOUNT_LINSYSFS); -#else -PSEUDOFS(debugfs, 1, VFCF_JAIL); -#endif +PSEUDOFS(lindebugfs, 1, VFCF_JAIL); MODULE_DEPEND(lindebugfs, linuxkpi, 1, 1, 1); |