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Code Issues Releases Activity

pipe: use unr64

Browse Source 
Reviewed by:	kib
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D18054
This commit is contained in:
Mateusz Guzik 2018-11-20 14:59:27 +00:00
parent 435bef7a2f
commit 737037f6c0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=340677
1 changed files with 3 additions and 24 deletions
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27
sys/kern/sys_pipe.c
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@ -244,7 +244,7 @@ static int pipe_zone_init(void *mem, int size, int flags);
static void pipe_zone_fini(void *mem, int size);
static uma_zone_t pipe_zone;
static struct unrhdr *pipeino_unr;
static struct unrhdr64 pipeino_unr;
static dev_t pipedev_ino;
SYSINIT(vfs, SI_SUB_VFS, SI_ORDER_ANY, pipeinit, NULL);
@ -257,8 +257,7 @@ pipeinit(void *dummy __unused)
pipe_zone_ctor, NULL, pipe_zone_init, pipe_zone_fini,
UMA_ALIGN_PTR, 0);
KASSERT(pipe_zone != NULL, ("pipe_zone not initialized"));
pipeino_unr = new_unrhdr(1, INT32_MAX, NULL);
KASSERT(pipeino_unr != NULL, ("pipe fake inodes not initialized"));
new_unrhdr64(&pipeino_unr, 1);
pipedev_ino = devfs_alloc_cdp_inode();
KASSERT(pipedev_ino > 0, ("pipe dev inode not initialized"));
}
@ -390,8 +389,6 @@ pipe_dtor(struct pipe *dpipe)
funsetown(&peer->pipe_sigio);
pipeclose(peer);
}
if (ino != 0 && ino != (ino_t)-1)
free_unr(pipeino_unr, ino);
}
/*
@ -639,7 +636,7 @@ pipe_create(struct pipe *pipe, int backing)
(void)pipespace_new(pipe, PIPE_SIZE);
}
pipe->pipe_ino = -1;
pipe->pipe_ino = alloc_unr64(&pipeino_unr);
}
/* ARGSUSED */
@ -1461,7 +1458,6 @@ pipe_stat(struct file *fp, struct stat *ub, struct ucred *active_cred,
struct thread *td)
{
struct pipe *pipe;
int new_unr;
#ifdef MAC
int error;
#endif
@ -1482,23 +1478,6 @@ pipe_stat(struct file *fp, struct stat *ub, struct ucred *active_cred,
return (vnops.fo_stat(fp, ub, active_cred, td));
}
/*
* Lazily allocate an inode number for the pipe. Most pipe
* users do not call fstat(2) on the pipe, which means that
* postponing the inode allocation until it is must be
* returned to userland is useful. If alloc_unr failed,
* assign st_ino zero instead of returning an error.
* Special pipe_ino values:
* -1 - not yet initialized;
* 0 - alloc_unr failed, return 0 as st_ino forever.
*/
if (pipe->pipe_ino == (ino_t)-1) {
new_unr = alloc_unr(pipeino_unr);
if (new_unr != -1)
pipe->pipe_ino = new_unr;
else
pipe->pipe_ino = 0;
}
PIPE_UNLOCK(pipe);
bzero(ub, sizeof(*ub));