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zfs_enter rework

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Replace ZFS_ENTER and ZFS_VERIFY_ZP, which have hidden returns, with
functions that return error code. The reason we want to do this is
because hidden returns are not obvious and had caused some missing fail
path unwinding.

This patch changes the common, linux, and freebsd parts. Also fixes
fail path unwinding in zfs_fsync, zpl_fsync, zpl_xattr_{list,get,set}, and
zfs_lookup().

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Chunwei Chen <david.chen@nutanix.com>
Closes #13831
This commit is contained in:
Chunwei Chen
2022-09-16 13:36:47 -07:00
committed by GitHub
parent b24d1c77f7
commit 768eacedef
15 changed files with 591 additions and 486 deletions
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include/os/freebsd/zfs/sys/zfs_znode_impl.h
+15 -20
View File
@@ -121,29 +121,24 @@ typedef struct zfs_soft_state {
#define zn_rlimit_fsize(zp, uio) \
vn_rlimit_fsize(ZTOV(zp), GET_UIO_STRUCT(uio), zfs_uio_td(uio))
#define ZFS_ENTER_ERROR(zfsvfs, error) do { \
ZFS_TEARDOWN_ENTER_READ((zfsvfs), FTAG); \
if (__predict_false((zfsvfs)->z_unmounted)) { \
ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG); \
return (error); \
} \
} while (0)
/* Called on entry to each ZFS vnode and vfs operation */
#define ZFS_ENTER(zfsvfs) ZFS_ENTER_ERROR(zfsvfs, EIO)
static inline int
zfs_enter(zfsvfs_t *zfsvfs, const char *tag)
{
ZFS_TEARDOWN_ENTER_READ(zfsvfs, tag);
if (__predict_false((zfsvfs)->z_unmounted)) {
ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag);
return (SET_ERROR(EIO));
}
return (0);
}
/* Must be called before exiting the vop */
#define ZFS_EXIT(zfsvfs) ZFS_TEARDOWN_EXIT_READ(zfsvfs, FTAG)
#define ZFS_VERIFY_ZP_ERROR(zp, error) do { \
if (__predict_false((zp)->z_sa_hdl == NULL)) { \
ZFS_EXIT((zp)->z_zfsvfs); \
return (error); \
} \
} while (0)
/* Verifies the znode is valid */
#define ZFS_VERIFY_ZP(zp) ZFS_VERIFY_ZP_ERROR(zp, EIO)
static inline void
zfs_exit(zfsvfs_t *zfsvfs, const char *tag)
{
ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag);
}
/*
* Macros for dealing with dmu_buf_hold