diff options
Diffstat (limited to 'fs/xfs/xfs_extfree_item.h')
| -rw-r--r-- | fs/xfs/xfs_extfree_item.h | 185 |
1 files changed, 60 insertions, 125 deletions
diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h index 432222418c56..af1b0331f7af 100644 --- a/fs/xfs/xfs_extfree_item.h +++ b/fs/xfs/xfs_extfree_item.h @@ -1,109 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2000,2005 Silicon Graphics, Inc. * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_EXTFREE_ITEM_H__ #define __XFS_EXTFREE_ITEM_H__ -struct xfs_mount; -struct kmem_zone; - -typedef struct xfs_extent { - xfs_dfsbno_t ext_start; - xfs_extlen_t ext_len; -} xfs_extent_t; - -/* - * Since an xfs_extent_t has types (start:64, len: 32) - * there are different alignments on 32 bit and 64 bit kernels. - * So we provide the different variants for use by a - * conversion routine. - */ - -typedef struct xfs_extent_32 { - __uint64_t ext_start; - __uint32_t ext_len; -} __attribute__((packed)) xfs_extent_32_t; - -typedef struct xfs_extent_64 { - __uint64_t ext_start; - __uint32_t ext_len; - __uint32_t ext_pad; -} xfs_extent_64_t; - -/* - * This is the structure used to lay out an efi log item in the - * log. The efi_extents field is a variable size array whose - * size is given by efi_nextents. - */ -typedef struct xfs_efi_log_format { - __uint16_t efi_type; /* efi log item type */ - __uint16_t efi_size; /* size of this item */ - __uint32_t efi_nextents; /* # extents to free */ - __uint64_t efi_id; /* efi identifier */ - xfs_extent_t efi_extents[1]; /* array of extents to free */ -} xfs_efi_log_format_t; - -typedef struct xfs_efi_log_format_32 { - __uint16_t efi_type; /* efi log item type */ - __uint16_t efi_size; /* size of this item */ - __uint32_t efi_nextents; /* # extents to free */ - __uint64_t efi_id; /* efi identifier */ - xfs_extent_32_t efi_extents[1]; /* array of extents to free */ -} __attribute__((packed)) xfs_efi_log_format_32_t; +/* kernel only EFI/EFD definitions */ -typedef struct xfs_efi_log_format_64 { - __uint16_t efi_type; /* efi log item type */ - __uint16_t efi_size; /* size of this item */ - __uint32_t efi_nextents; /* # extents to free */ - __uint64_t efi_id; /* efi identifier */ - xfs_extent_64_t efi_extents[1]; /* array of extents to free */ -} xfs_efi_log_format_64_t; - -/* - * This is the structure used to lay out an efd log item in the - * log. The efd_extents array is a variable size array whose - * size is given by efd_nextents; - */ -typedef struct xfs_efd_log_format { - __uint16_t efd_type; /* efd log item type */ - __uint16_t efd_size; /* size of this item */ - __uint32_t efd_nextents; /* # of extents freed */ - __uint64_t efd_efi_id; /* id of corresponding efi */ - xfs_extent_t efd_extents[1]; /* array of extents freed */ -} xfs_efd_log_format_t; - -typedef struct xfs_efd_log_format_32 { - __uint16_t efd_type; /* efd log item type */ - __uint16_t efd_size; /* size of this item */ - __uint32_t efd_nextents; /* # of extents freed */ - __uint64_t efd_efi_id; /* id of corresponding efi */ - xfs_extent_32_t efd_extents[1]; /* array of extents freed */ -} __attribute__((packed)) xfs_efd_log_format_32_t; - -typedef struct xfs_efd_log_format_64 { - __uint16_t efd_type; /* efd log item type */ - __uint16_t efd_size; /* size of this item */ - __uint32_t efd_nextents; /* # of extents freed */ - __uint64_t efd_efi_id; /* id of corresponding efi */ - xfs_extent_64_t efd_extents[1]; /* array of extents freed */ -} xfs_efd_log_format_64_t; - - -#ifdef __KERNEL__ +struct xfs_mount; +struct kmem_cache; /* * Max number of extents in fast allocation path. @@ -111,55 +17,84 @@ typedef struct xfs_efd_log_format_64 { #define XFS_EFI_MAX_FAST_EXTENTS 16 /* - * Define EFI flag bits. Manipulated by set/clear/test_bit operators. - */ -#define XFS_EFI_RECOVERED 1 - -/* * This is the "extent free intention" log item. It is used to log the fact * that some extents need to be free. It is used in conjunction with the * "extent free done" log item described below. * * The EFI is reference counted so that it is not freed prior to both the EFI - * and EFD being committed and unpinned. This ensures that when the last - * reference goes away the EFI will always be in the AIL as it has been - * unpinned, regardless of whether the EFD is processed before or after the EFI. + * and EFD being committed and unpinned. This ensures the EFI is inserted into + * the AIL even in the event of out of order EFI/EFD processing. In other words, + * an EFI is born with two references: + * + * 1.) an EFI held reference to track EFI AIL insertion + * 2.) an EFD held reference to track EFD commit + * + * On allocation, both references are the responsibility of the caller. Once the + * EFI is added to and dirtied in a transaction, ownership of reference one + * transfers to the transaction. The reference is dropped once the EFI is + * inserted to the AIL or in the event of failure along the way (e.g., commit + * failure, log I/O error, etc.). Note that the caller remains responsible for + * the EFD reference under all circumstances to this point. The caller has no + * means to detect failure once the transaction is committed, however. + * Therefore, an EFD is required after this point, even in the event of + * unrelated failure. + * + * Once an EFD is allocated and dirtied in a transaction, reference two + * transfers to the transaction. The EFD reference is dropped once it reaches + * the unpin handler. Similar to the EFI, the reference also drops in the event + * of commit failure or log I/O errors. Note that the EFD is not inserted in the + * AIL, so at this point both the EFI and EFD are freed. */ -typedef struct xfs_efi_log_item { - xfs_log_item_t efi_item; +struct xfs_efi_log_item { + struct xfs_log_item efi_item; atomic_t efi_refcount; atomic_t efi_next_extent; - unsigned long efi_flags; /* misc flags */ - xfs_efi_log_format_t efi_format; -} xfs_efi_log_item_t; + struct xfs_efi_log_format efi_format; +}; + +static inline size_t +xfs_efi_log_item_sizeof( + unsigned int nr) +{ + return offsetof(struct xfs_efi_log_item, efi_format) + + xfs_efi_log_format_sizeof(nr); +} /* * This is the "extent free done" log item. It is used to log * the fact that some extents earlier mentioned in an efi item * have been freed. */ -typedef struct xfs_efd_log_item { - xfs_log_item_t efd_item; - xfs_efi_log_item_t *efd_efip; +struct xfs_efd_log_item { + struct xfs_log_item efd_item; + struct xfs_efi_log_item *efd_efip; uint efd_next_extent; - xfs_efd_log_format_t efd_format; -} xfs_efd_log_item_t; + struct xfs_efd_log_format efd_format; +}; + +static inline size_t +xfs_efd_log_item_sizeof( + unsigned int nr) +{ + return offsetof(struct xfs_efd_log_item, efd_format) + + xfs_efd_log_format_sizeof(nr); +} /* * Max number of extents in fast allocation path. */ #define XFS_EFD_MAX_FAST_EXTENTS 16 -extern struct kmem_zone *xfs_efi_zone; -extern struct kmem_zone *xfs_efd_zone; +extern struct kmem_cache *xfs_efi_cache; +extern struct kmem_cache *xfs_efd_cache; + +struct xfs_extent_free_item; -xfs_efi_log_item_t *xfs_efi_init(struct xfs_mount *, uint); -xfs_efd_log_item_t *xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *, - uint); -int xfs_efi_copy_format(xfs_log_iovec_t *buf, - xfs_efi_log_format_t *dst_efi_fmt); -void xfs_efi_item_free(xfs_efi_log_item_t *); +void xfs_extent_free_defer_add(struct xfs_trans *tp, + struct xfs_extent_free_item *xefi, + struct xfs_defer_pending **dfpp); -#endif /* __KERNEL__ */ +unsigned int xfs_efi_log_space(unsigned int nr); +unsigned int xfs_efd_log_space(unsigned int nr); #endif /* __XFS_EXTFREE_ITEM_H__ */ |