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[XFS] Make the pflags test/set wrappers more legible for us mere humans. 

SGI-PV: 953338
SGI-Modid: xfs-linux-melb:xfs-kern:26099a

Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
Nathan Scott 2006-06-09 14:59:13 +10:00
parent e109007461
commit 59c1b082f5
4 changed files with 24 additions and 57 deletions
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38
fs/xfs/linux-2.6/kmem.h
View File

@ -22,42 +22,6 @@
#include <linux/sched.h>
#include <linux/mm.h>
/*
* Process flags handling
*/
#define PFLAGS_TEST_NOIO() (current->flags & PF_NOIO)
#define PFLAGS_TEST_FSTRANS() (current->flags & PF_FSTRANS)
#define PFLAGS_SET_NOIO() do { \
current->flags |= PF_NOIO; \
} while (0)
#define PFLAGS_CLEAR_NOIO() do { \
current->flags &= ~PF_NOIO; \
} while (0)
/* these could be nested, so we save state */
#define PFLAGS_SET_FSTRANS(STATEP) do { \
*(STATEP) = current->flags; \
current->flags |= PF_FSTRANS; \
} while (0)
#define PFLAGS_CLEAR_FSTRANS(STATEP) do { \
*(STATEP) = current->flags; \
current->flags &= ~PF_FSTRANS; \
} while (0)
/* Restore the PF_FSTRANS state to what was saved in STATEP */
#define PFLAGS_RESTORE_FSTRANS(STATEP) do { \
current->flags = ((current->flags & ~PF_FSTRANS) | \
(*(STATEP) & PF_FSTRANS)); \
} while (0)
#define PFLAGS_DUP(OSTATEP, NSTATEP) do { \
*(NSTATEP) = *(OSTATEP); \
} while (0)
/*
* General memory allocation interfaces
*/
@ -83,7 +47,7 @@ kmem_flags_convert(unsigned int __nocast flags)
lflags = GFP_ATOMIC | __GFP_NOWARN;
} else {
lflags = GFP_KERNEL | __GFP_NOWARN;
if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS))
if ((current->flags & PF_FSTRANS) || (flags & KM_NOFS))
lflags &= ~__GFP_FS;
}
return lflags;

4
fs/xfs/linux-2.6/xfs_aops.c
View File

@ -1126,7 +1126,7 @@ xfs_vm_writepage(
* then mark the page dirty again and leave the page
* as is.
*/
if (PFLAGS_TEST_FSTRANS() && need_trans)
if (current_test_flags(PF_FSTRANS) && need_trans)
goto out_fail;
/*
@ -1203,7 +1203,7 @@ xfs_vm_releasepage(
/* If we are already inside a transaction or the thread cannot
* do I/O, we cannot release this page.
*/
if (PFLAGS_TEST_FSTRANS())
if (current_test_flags(PF_FSTRANS))
return 0;
/*

14
fs/xfs/linux-2.6/xfs_linux.h
View File

@ -136,13 +136,19 @@ BUFFER_FNS(PrivateStart, unwritten);
#define xfs_rotorstep xfs_params.rotorstep.val
#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
#ifndef raw_smp_processor_id
#define raw_smp_processor_id() smp_processor_id()
#endif
#define current_cpu() raw_smp_processor_id()
#define current_cpu() (raw_smp_processor_id())
#define current_pid() (current->pid)
#define current_fsuid(cred) (current->fsuid)
#define current_fsgid(cred) (current->fsgid)
#define current_set_flags(f) (current->flags |= (f))
#define current_test_flags(f) (current->flags & (f))
#define current_clear_flags(f) (current->flags & ~(f))
#define current_set_flags_nested(sp, f) \
(*(sp) = current->flags, current->flags |= (f))
#define current_clear_flags_nested(sp, f) \
(*(sp) = current->flags, current->flags &= ~(f))
#define current_restore_flags_nested(sp, f) \
(current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
#define NBPP PAGE_SIZE
#define DPPSHFT (PAGE_SHIFT - 9)

25
fs/xfs/xfs_trans.c
View File

@ -303,7 +303,7 @@ xfs_trans_dup(
tp->t_blk_res = tp->t_blk_res_used;
ntp->t_rtx_res = tp->t_rtx_res - tp->t_rtx_res_used;
tp->t_rtx_res = tp->t_rtx_res_used;
PFLAGS_DUP(&tp->t_pflags, &ntp->t_pflags);
ntp->t_pflags = tp->t_pflags;
XFS_TRANS_DUP_DQINFO(tp->t_mountp, tp, ntp);
@ -335,14 +335,11 @@ xfs_trans_reserve(
uint logcount)
{
int log_flags;
int error;
int rsvd;
error = 0;
rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
int error = 0;
int rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
/* Mark this thread as being in a transaction */
PFLAGS_SET_FSTRANS(&tp->t_pflags);
current_set_flags_nested(&tp->t_pflags, PF_FSTRANS);
/*
* Attempt to reserve the needed disk blocks by decrementing
@ -353,7 +350,7 @@ xfs_trans_reserve(
error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FDBLOCKS,
-blocks, rsvd);
if (error != 0) {
PFLAGS_RESTORE_FSTRANS(&tp->t_pflags);
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
return (XFS_ERROR(ENOSPC));
}
tp->t_blk_res += blocks;
@ -426,9 +423,9 @@ undo_blocks:
tp->t_blk_res = 0;
}
PFLAGS_RESTORE_FSTRANS(&tp->t_pflags);
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
return (error);
return error;
}
@ -819,7 +816,7 @@ shut_us_down:
if (commit_lsn == -1 && !shutdown)
shutdown = XFS_ERROR(EIO);
}
PFLAGS_RESTORE_FSTRANS(&tp->t_pflags);
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
xfs_trans_free_items(tp, shutdown? XFS_TRANS_ABORT : 0);
xfs_trans_free_busy(tp);
xfs_trans_free(tp);
@ -884,7 +881,7 @@ shut_us_down:
* had pinned, clean up, free trans structure, and return error.
*/
if (error || commit_lsn == -1) {
PFLAGS_RESTORE_FSTRANS(&tp->t_pflags);
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
xfs_trans_uncommit(tp, flags|XFS_TRANS_ABORT);
return XFS_ERROR(EIO);
}
@ -926,7 +923,7 @@ shut_us_down:
/*
* Mark this thread as no longer being in a transaction
*/
PFLAGS_RESTORE_FSTRANS(&tp->t_pflags);
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
/*
* Once all the items of the transaction have been copied
@ -1182,7 +1179,7 @@ xfs_trans_cancel(
}
/* mark this thread as no longer being in a transaction */
PFLAGS_RESTORE_FSTRANS(&tp->t_pflags);
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
xfs_trans_free_items(tp, flags);
xfs_trans_free_busy(tp);