#include <fuse.h>
#include <ftw.h>
#include <mqueue.h>
+#include <attr/xattr.h>
struct wimlib_fd {
u16 idx;
put_dentry(dentry);
}
+static void remove_ads(struct dentry *dentry,
+ struct ads_entry *ads_entry,
+ struct lookup_table *lookup_table)
+{
+ struct lookup_table_entry *lte;
+
+ wimlib_assert(dentry->resolved);
+
+ lte = lte_decrement_refcnt(lte, lookup_table);
+ if (lte)
+ list_del(&ads_entry->lte_group_list.list);
+ dentry_remove_ads(dentry, ads_entry);
+}
+
/* Transfers file attributes from a struct dentry to a `stat' buffer. */
int dentry_to_stbuf(const struct dentry *dentry, struct stat *stbuf)
{
new_lte->resource_entry.original_size = size;
new_lte->refcnt = link_group_size;
random_hash(new_lte->hash);
+ if (new_lte->staging_file_name)
+ FREE(new_lte->staging_file_name);
new_lte->staging_file_name = staging_file_name;
new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
return dentry_to_stbuf(dentry, stbuf);
}
+/* Read an alternate data stream through the XATTR interface, or get its size */
static int wimfs_getxattr(const char *path, const char *name, char *value,
size_t size)
{
- /* XXX */
- return -ENOTSUP;
+ int ret;
+ struct dentry *dentry;
+ struct ads_entry *ads_entry;
+ size_t res_size;
+ struct lookup_table_entry *lte;
+
+ if (!(mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
+ return -ENOTSUP;
+
+ if (memcmp(name, "user.", 5) != 0)
+ return -ENOATTR;
+ name += 5;
+
+ dentry = get_dentry(w, path);
+ if (!dentry)
+ return -ENOENT;
+ ads_entry = dentry_get_ads_entry(dentry, name);
+ if (!ads_entry)
+ return -ENOATTR;
+
+ lte = ads_entry->lte;
+ res_size = wim_resource_size(lte);
+
+ if (size == 0)
+ return res_size;
+ if (res_size > size)
+ return -ERANGE;
+ ret = read_full_wim_resource(lte, value);
+ if (ret != 0)
+ return -EIO;
+ return res_size;
}
/* Create a hard link */
static int wimfs_listxattr(const char *path, char *list, size_t size)
{
- /* XXX */
- return -ENOTSUP;
+ struct dentry *dentry;
+ int ret;
+ char *p = list;
+ size_t needed_size;
+ unsigned i;
+ if (!(mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
+ return -ENOTSUP;
+
+ /* List alternate data streams, or get the list size */
+
+ ret = lookup_resource(w, path, get_lookup_flags(), &dentry, NULL, NULL);
+ if (ret != 0)
+ return ret;
+ if (size == 0) {
+ needed_size = 0;
+ for (i = 0; i < dentry->num_ads; i++)
+ needed_size += dentry->ads_entries[i].stream_name_utf8_len + 6;
+ return needed_size;
+ } else {
+ for (i = 0; i < dentry->num_ads; i++) {
+ needed_size = dentry->ads_entries[i].stream_name_utf8_len + 6;
+ if (needed_size > size)
+ return -ERANGE;
+ p += sprintf(p, "user.%s",
+ dentry->ads_entries[i].stream_name_utf8) + 1;
+ size -= needed_size;
+ }
+ return p - list;
+ }
}
/*
* directly from the WIM file if we are opening it read-only,
* but we need to extract the resource to the staging directory
* if we are opening it writable. */
- if (flags_writable(fi->flags) && !lte->staging_file_name) {
+ if (flags_writable(fi->flags) &&
+ lte->resource_location != RESOURCE_IN_STAGING_FILE) {
ret = extract_resource_to_staging_dir(dentry, stream_idx, <e,
lte->resource_entry.original_size);
if (ret != 0)
return 0;
}
+/* Remove an alternate data stream through the XATTR interface */
static int wimfs_removexattr(const char *path, const char *name)
{
- /* XXX */
- return -ENOTSUP;
+ struct dentry *dentry;
+ struct ads_entry *ads_entry;
+ int ret;
+ if (!(mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
+ return -ENOTSUP;
+
+ if (memcmp(name, "user.", 5) != 0)
+ return -ENOATTR;
+ name += 5;
+
+ dentry = get_dentry(w, path);
+ if (!dentry)
+ return -ENOENT;
+
+ ads_entry = dentry_get_ads_entry(dentry, name);
+ if (!ads_entry)
+ return -ENOATTR;
+ remove_ads(dentry, ads_entry, w->lookup_table);
+ return 0;
}
/* Renames a file or directory. See rename (3) */
return 0;
}
+/* Write an alternate data stream through the XATTR interface */
static int wimfs_setxattr(const char *path, const char *name,
const char *value, size_t size, int flags)
{
- /* XXX */
- return -ENOTSUP;
+ struct dentry *dentry;
+ struct ads_entry *existing_ads_entry;
+ struct ads_entry *new_ads_entry;
+ struct lookup_table_entry *existing_lte;
+ struct lookup_table_entry *lte;
+ u8 value_hash[SHA1_HASH_SIZE];
+ int ret;
+ int fd;
+
+ if (!(mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
+ return -ENOTSUP;
+
+ dentry = get_dentry(w, path);
+ if (!dentry)
+ return -ENOENT;
+ existing_ads_entry = dentry_get_ads_entry(dentry, name);
+ if (existing_ads_entry) {
+ if (flags & XATTR_CREATE)
+ return -EEXIST;
+ remove_ads(dentry, existing_ads_entry, w->lookup_table);
+ } else {
+ if (flags & XATTR_REPLACE)
+ return -ENOATTR;
+ }
+ new_ads_entry = dentry_add_ads(dentry, name);
+ if (!new_ads_entry)
+ return -ENOMEM;
+
+ sha1_buffer(value, size, value_hash);
+
+ existing_lte = __lookup_resource(w->lookup_table, value_hash);
+
+ if (existing_lte) {
+ lte = existing_lte;
+ lte->refcnt++;
+ } else {
+ char *value_copy;
+ lte = new_lookup_table_entry();
+ if (!lte)
+ return -ENOMEM;
+ value_copy = MALLOC(size);
+ if (!value_copy) {
+ FREE(lte);
+ return -ENOMEM;
+ }
+ lte->resource_location = RESOURCE_IN_ATTACHED_BUFFER;
+ lte->attached_buffer = value_copy;
+ lte->resource_entry.original_size = size;
+ lte->resource_entry.size = size;
+ lte->resource_entry.flags = 0;
+ copy_hash(lte->hash, value_hash);
+ lookup_table_insert(w->lookup_table, lte);
+ }
+ new_ads_entry->lte = lte;
+ return 0;
}
static int wimfs_symlink(const char *to, const char *from)
remove_dentry(dentry, w->lookup_table);
} else {
/* We are removing an alternate data stream. */
- struct ads_entry *ads_entry;
-
- ads_entry = &dentry->ads_entries[stream_idx - 1];
- lte = lte_decrement_refcnt(lte, w->lookup_table);
- if (lte)
- list_del(&ads_entry->lte_group_list.list);
- dentry_remove_ads(dentry, ads_entry);
+ remove_ads(dentry, &dentry->ads_entries[stream_idx - 1],
+ w->lookup_table);
}
/* Beware: The lookup table entry(s) may still be referenced by users
* that have opened the corresponding streams. They are freed later in
git://wimlib.net / wimlib / blobdiff