Mark
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
#include "sys/mem/slab.h"
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#include "sys/assert.h"
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#include "user/errno.h"
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#include "sys/string.h"
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#include "sys/debug.h"
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#include "fs/fs.h"
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static LIST_HEAD(fs_class_list);
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static LIST_HEAD(fs_mount_list);
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static struct slab_cache *fs_mount_cache;
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struct fs *fs_create(struct fs_class *cls, struct blkdev *blk, uint32_t flags, const char *opt) {
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if (!fs_mount_cache) {
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kdebug("Initialize filesystem instance (mount) cache\n");
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fs_mount_cache = slab_cache_get(sizeof(struct fs));
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_assert(fs_mount_cache);
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}
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struct fs *fs = slab_calloc(fs_mount_cache);
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_assert(fs);
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list_head_init(&fs->link);
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fs->cls = cls;
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fs->blk = blk;
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fs->flags = flags;
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if (cls->init) {
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if (cls->init(fs, opt) != 0) {
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kerror("%s: filesystem instance init failed\n", cls->name);
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slab_free(fs_mount_cache, fs);
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return NULL;
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}
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} else {
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kwarn("%s: filesystem type has no init func\n", cls->name);
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}
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list_add(&fs->link, &fs_mount_list);
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return fs;
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}
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struct fs_class *fs_class_by_name(const char *name) {
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struct fs_class *cls;
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list_for_each_entry(cls, &fs_class_list, link) {
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if (!strcmp(cls->name, name)) {
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return cls;
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}
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}
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return NULL;
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}
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int fs_class_register(struct fs_class *cls) {
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if (fs_class_by_name(cls->name)) {
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return -EEXIST;
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}
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list_head_init(&cls->link);
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list_add(&cls->link, &fs_class_list);
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return 0;
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}
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