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uipc_shm: use unr64 for inode numbers

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Sponsored by:	The FreeBSD Foundation
This commit is contained in:
mjg 2018-11-21 22:01:06 +00:00
parent 3c79232eb6
commit 6fd8f10bb4
1 changed files with 3 additions and 11 deletions
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14
sys/kern/uipc_shm.c
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@ -113,7 +113,7 @@ static LIST_HEAD(, shm_mapping) *shm_dictionary;
static struct sx shm_dict_lock;
static struct mtx shm_timestamp_lock;
static u_long shm_hash;
static struct unrhdr *shm_ino_unr;
static struct unrhdr64 shm_ino_unr;
static dev_t shm_dev_ino;
#define SHM_HASH(fnv) (&shm_dictionary[(fnv) & shm_hash])
@ -531,7 +531,6 @@ struct shmfd *
shm_alloc(struct ucred *ucred, mode_t mode)
{
struct shmfd *shmfd;
int ino;
shmfd = malloc(sizeof(*shmfd), M_SHMFD, M_WAITOK | M_ZERO);
shmfd->shm_size = 0;
@ -549,11 +548,7 @@ shm_alloc(struct ucred *ucred, mode_t mode)
vfs_timestamp(&shmfd->shm_birthtime);
shmfd->shm_atime = shmfd->shm_mtime = shmfd->shm_ctime =
shmfd->shm_birthtime;
ino = alloc_unr(shm_ino_unr);
if (ino == -1)
shmfd->shm_ino = 0;
else
shmfd->shm_ino = ino;
shmfd->shm_ino = alloc_unr64(&shm_ino_unr);
refcount_init(&shmfd->shm_refs, 1);
mtx_init(&shmfd->shm_mtx, "shmrl", NULL, MTX_DEF);
rangelock_init(&shmfd->shm_rl);
@ -584,8 +579,6 @@ shm_drop(struct shmfd *shmfd)
rangelock_destroy(&shmfd->shm_rl);
mtx_destroy(&shmfd->shm_mtx);
vm_object_deallocate(shmfd->shm_object);
if (shmfd->shm_ino != 0)
free_unr(shm_ino_unr, shmfd->shm_ino);
free(shmfd, M_SHMFD);
}
}
@ -624,8 +617,7 @@ shm_init(void *arg)
mtx_init(&shm_timestamp_lock, "shm timestamps", NULL, MTX_DEF);
sx_init(&shm_dict_lock, "shm dictionary");
shm_dictionary = hashinit(1024, M_SHMFD, &shm_hash);
shm_ino_unr = new_unrhdr(1, INT32_MAX, NULL);
KASSERT(shm_ino_unr != NULL, ("shm fake inodes not initialized"));
new_unrhdr64(&shm_ino_unr, 1);
shm_dev_ino = devfs_alloc_cdp_inode();
KASSERT(shm_dev_ino > 0, ("shm dev inode not initialized"));
}