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devfs: checks and fixes

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Matheus
2024-09-14 17:37:23 -03:00
parent f04b7901e8
commit 560e3c0aa1
1 changed files with 34 additions and 1 deletions
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kernel-src/fs/devfs.c
+34 -1
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@@ -72,6 +72,12 @@ int devfs_close(vnode_t *node, int flags, cred_t *cred) {
}
int devfs_read(vnode_t *node, void *buffer, size_t size, uintmax_t offset, int flags, size_t *readc, cred_t *cred) {
if (node->type == V_TYPE_DIR)
return EISDIR;
if (node->type != V_TYPE_BLKDEV && node->type != V_TYPE_CHDEV)
return ENODEV;
devnode_t *devnode = (devnode_t *)node;
if (devnode->master)
devnode = devnode->master;
@@ -83,6 +89,12 @@ int devfs_read(vnode_t *node, void *buffer, size_t size, uintmax_t offset, int f
}
int devfs_write(vnode_t *node, void *buffer, size_t size, uintmax_t offset, int flags, size_t *writec, cred_t *cred) {
if (node->type == V_TYPE_DIR)
return EISDIR;
if (node->type != V_TYPE_BLKDEV && node->type != V_TYPE_CHDEV)
return ENODEV;
devnode_t *devnode = (devnode_t *)node;
if (devnode->master)
devnode = devnode->master;
@@ -158,17 +170,23 @@ int devfs_setattr(vnode_t *node, vattr_t *attr, int which, cred_t *cred) {
}
int devfs_poll(vnode_t *node, polldata_t *data, int events) {
if (node->type != V_TYPE_BLKDEV && node->type != V_TYPE_CHDEV)
return events;
devnode_t *devnode = (devnode_t *)node;
if (devnode->master)
devnode = devnode->master;
if (devnode->devops->poll == NULL)
return ENODEV;
return events;
return devnode->devops->poll(devnode->attr.rdevminor, data, events);
}
int devfs_mmap(vnode_t *node, void *addr, uintmax_t offset, int flags, cred_t *cred) {
if (node->type != V_TYPE_BLKDEV && node->type != V_TYPE_CHDEV)
return ENODEV;
devnode_t *devnode = (devnode_t *)node;
if (devnode->master)
devnode = devnode->master;
@@ -185,6 +203,9 @@ int devfs_mmap(vnode_t *node, void *addr, uintmax_t offset, int flags, cred_t *c
}
int devfs_munmap(vnode_t *node, void *addr, uintmax_t offset, int flags, cred_t *cred) {
if (node->type != V_TYPE_BLKDEV && node->type != V_TYPE_CHDEV)
return ENODEV;
devnode_t *devnode = (devnode_t *)node;
if (devnode->master)
devnode = devnode->master;
@@ -200,6 +221,9 @@ int devfs_access(vnode_t *vnode, mode_t mode, cred_t *cred) {
}
int devfs_isatty(vnode_t *node) {
if (node->type != V_TYPE_CHDEV)
return ENOTTY;
devnode_t *devnode = (devnode_t *)node;
if (devnode->master)
devnode = devnode->master;
@@ -208,6 +232,9 @@ int devfs_isatty(vnode_t *node) {
}
int devfs_ioctl(vnode_t *node, unsigned long request, void *arg, int *ret, cred_t *cred) {
if (node->type != V_TYPE_BLKDEV && node->type != V_TYPE_CHDEV)
return ENODEV;
devnode_t *devnode = (devnode_t *)node;
if (devnode->master)
devnode = devnode->master;
@@ -216,6 +243,9 @@ int devfs_ioctl(vnode_t *node, unsigned long request, void *arg, int *ret, cred_
}
int devfs_maxseek(vnode_t *node, size_t *max) {
if (node->type != V_TYPE_BLKDEV && node->type != V_TYPE_CHDEV)
return ENOTTY;
devnode_t *devnode = (devnode_t *)node;
if (devnode->master)
devnode = devnode->master;
@@ -241,6 +271,9 @@ int devfs_inactive(vnode_t *node) {
}
int devfs_create(vnode_t *parent, char *name, vattr_t *attr, int type, vnode_t **result, cred_t *cred) {
if (parent->type != V_TYPE_DIR)
return ENOTDIR;
if (type != V_TYPE_CHDEV && type != V_TYPE_BLKDEV && type != V_TYPE_DIR)
return EINVAL;