cregit-Linux how code gets into the kernel

Release 4.10 fs/xfs/xfs_inode.h

Directory: fs/xfs
/*
 * Copyright (c) 2000-2003,2005 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_INODE_H__

#define	__XFS_INODE_H__

#include "xfs_inode_buf.h"
#include "xfs_inode_fork.h"

/*
 * Kernel only inode definitions
 */
struct xfs_dinode;
struct xfs_inode;
struct xfs_buf;
struct xfs_defer_ops;
struct xfs_bmbt_irec;
struct xfs_inode_log_item;
struct xfs_mount;
struct xfs_trans;
struct xfs_dquot;


typedef struct xfs_inode {
	/* Inode linking and identification information. */
	
struct xfs_mount	*i_mount;	/* fs mount struct ptr */
	
struct xfs_dquot	*i_udquot;	/* user dquot */
	
struct xfs_dquot	*i_gdquot;	/* group dquot */
	
struct xfs_dquot	*i_pdquot;	/* project dquot */

	/* Inode location stuff */
	
xfs_ino_t		i_ino;		/* inode number (agno/agino)*/
	
struct xfs_imap		i_imap;		/* location for xfs_imap() */

	/* Extent information. */
	
xfs_ifork_t		*i_afp;		/* attribute fork pointer */
	
xfs_ifork_t		*i_cowfp;	/* copy on write extents */
	
xfs_ifork_t		i_df;		/* data fork */

	/* operations vectors */
	
const struct xfs_dir_ops *d_ops;		/* directory ops vector */

	/* Transaction and locking information. */
	
struct xfs_inode_log_item *i_itemp;	/* logging information */
	
mrlock_t		i_lock;		/* inode lock */
	
mrlock_t		i_mmaplock;	/* inode mmap IO lock */
	
atomic_t		i_pincount;	/* inode pin count */
	
spinlock_t		i_flags_lock;	/* inode i_flags lock */
	/* Miscellaneous state. */
	
unsigned long		i_flags;	/* see defined flags below */
	
unsigned int		i_delayed_blks;	/* count of delay alloc blks */

	
struct xfs_icdinode	i_d;		/* most of ondisk inode */

	
xfs_extnum_t		i_cnextents;	/* # of extents in cow fork */
	
unsigned int		i_cformat;	/* format of cow fork */

	/* VFS inode */
	
struct inode		i_vnode;	/* embedded VFS inode */
} 
xfs_inode_t;

/* Convert from vfs inode to xfs inode */

static inline struct xfs_inode *XFS_I(struct inode *inode) { return container_of(inode, struct xfs_inode, i_vnode); }

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david chinnerdavid chinner25100.00%2100.00%
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/* convert from xfs inode to vfs inode */
static inline struct inode *VFS_I(struct xfs_inode *ip) { return &ip->i_vnode; }

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david chinnerdavid chinner20100.00%2100.00%
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/* * For regular files we only update the on-disk filesize when actually * writing data back to disk. Until then only the copy in the VFS inode * is uptodate. */
static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip) { if (S_ISREG(VFS_I(ip)->i_mode)) return i_size_read(VFS_I(ip)); return ip->i_d.di_size; }

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christoph hellwigchristoph hellwig3690.00%150.00%
dave chinnerdave chinner410.00%150.00%
Total40100.00%2100.00%

/* * If this I/O goes past the on-disk inode size update it unless it would * be past the current in-core inode size. */
static inline xfs_fsize_t xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size) { xfs_fsize_t i_size = i_size_read(VFS_I(ip)); if (new_size > i_size || new_size < 0) new_size = i_size; return new_size > ip->i_d.di_size ? new_size : 0; }

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christoph hellwigchristoph hellwig4992.45%150.00%
brian fosterbrian foster47.55%150.00%
Total53100.00%2100.00%

/* * i_flags helper functions */
static inline void __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) { ip->i_flags |= flags; }

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david chinnerdavid chinner21100.00%1100.00%
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static inline void xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) { spin_lock(&ip->i_flags_lock); __xfs_iflags_set(ip, flags); spin_unlock(&ip->i_flags_lock); }

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david chinnerdavid chinner38100.00%1100.00%
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static inline void xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags) { spin_lock(&ip->i_flags_lock); ip->i_flags &= ~flags; spin_unlock(&ip->i_flags_lock); }

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david chinnerdavid chinner38100.00%1100.00%
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static inline int __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) { return (ip->i_flags & flags); }

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david chinnerdavid chinner24100.00%1100.00%
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static inline int xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) { int ret; spin_lock(&ip->i_flags_lock); ret = __xfs_iflags_test(ip, flags); spin_unlock(&ip->i_flags_lock); return ret; }

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david chinnerdavid chinner46100.00%1100.00%
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static inline int xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags) { int ret; spin_lock(&ip->i_flags_lock); ret = ip->i_flags & flags; if (ret) ip->i_flags &= ~flags; spin_unlock(&ip->i_flags_lock); return ret; }

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christoph hellwigchristoph hellwig56100.00%1100.00%
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static inline int xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags) { int ret; spin_lock(&ip->i_flags_lock); ret = ip->i_flags & flags; if (!ret) ip->i_flags |= flags; spin_unlock(&ip->i_flags_lock); return ret; }

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christoph hellwigchristoph hellwig56100.00%1100.00%
Total56100.00%1100.00%

/* * Project quota id helpers (previously projid was 16bit only * and using two 16bit values to hold new 32bit projid was chosen * to retain compatibility with "old" filesystems). */
static inline prid_t xfs_get_projid(struct xfs_inode *ip) { return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo; }

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arkadiusz miskiewiczarkadiusz miskiewicz30100.00%1100.00%
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static inline void xfs_set_projid(struct xfs_inode *ip, prid_t projid) { ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16); ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff); }

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arkadiusz miskiewiczarkadiusz miskiewicz45100.00%1100.00%
Total45100.00%1100.00%


static inline prid_t xfs_get_initial_prid(struct xfs_inode *dp) { if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) return xfs_get_projid(dp); return XFS_PROJID_DEFAULT; }

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zhi yong wuzhi yong wu31100.00%1100.00%
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static inline bool xfs_is_reflink_inode(struct xfs_inode *ip) { return ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK; }

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darrick j. wongdarrick j. wong21100.00%1100.00%
Total21100.00%1100.00%

/* * In-core inode flags. */ #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */ #define XFS_ISTALE (1 << 1) /* inode has been staled */ #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */ #define XFS_INEW (1 << 3) /* inode has just been allocated */ #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */ #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */ #define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */ #define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT) #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */ #define XFS_IPINNED (1 << __XFS_IPINNED_BIT) #define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */ #define XFS_IEOFBLOCKS (1 << 10) /* has the preallocblocks tag set */ /* * If this unlinked inode is in the middle of recovery, don't let drop_inode * truncate and free the inode. This can happen if we iget the inode during * log recovery to replay a bmap operation on the inode. */ #define XFS_IRECOVERY (1 << 11) /* * Per-lifetime flags need to be reset when re-using a reclaimable inode during * inode lookup. This prevents unintended behaviour on the new inode from * ocurring. */ #define XFS_IRECLAIM_RESET_FLAGS \ (XFS_IRECLAIMABLE | XFS_IRECLAIM | \ XFS_IDIRTY_RELEASE | XFS_ITRUNCATED) /* * Synchronize processes attempting to flush the in-core inode back to disk. */
static inline int xfs_isiflocked(struct xfs_inode *ip) { return xfs_iflags_test(ip, XFS_IFLOCK); }

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brian fosterbrian foster20100.00%1100.00%
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extern void __xfs_iflock(struct xfs_inode *ip);
static inline int xfs_iflock_nowait(struct xfs_inode *ip) { return !xfs_iflags_test_and_set(ip, XFS_IFLOCK); }

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christoph hellwigchristoph hellwig21100.00%1100.00%
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static inline void xfs_iflock(struct xfs_inode *ip) { if (!xfs_iflock_nowait(ip)) __xfs_iflock(ip); }

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christoph hellwigchristoph hellwig25100.00%1100.00%
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static inline void xfs_ifunlock(struct xfs_inode *ip) { ASSERT(xfs_isiflocked(ip)); xfs_iflags_clear(ip, XFS_IFLOCK); smp_mb(); wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT); }

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christoph hellwigchristoph hellwig2972.50%133.33%
brian fosterbrian foster820.00%133.33%
alex elderalex elder37.50%133.33%
Total40100.00%3100.00%

/* * Flags for inode locking. * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield) * 1<<16 - 1<<32-1 -- lockdep annotation (integers) */ #define XFS_IOLOCK_EXCL (1<<0) #define XFS_IOLOCK_SHARED (1<<1) #define XFS_ILOCK_EXCL (1<<2) #define XFS_ILOCK_SHARED (1<<3) #define XFS_MMAPLOCK_EXCL (1<<4) #define XFS_MMAPLOCK_SHARED (1<<5) #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \ | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \ | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED) #define XFS_LOCK_FLAGS \ { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \ { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \ { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \ { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \ { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \ { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" } /* * Flags for lockdep annotations. * * XFS_LOCK_PARENT - for directory operations that require locking a * parent directory inode and a child entry inode. IOLOCK requires nesting, * MMAPLOCK does not support this class, ILOCK requires a single subclass * to differentiate parent from child. * * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary * inodes do not participate in the normal lock order, and thus have their * own subclasses. * * XFS_LOCK_INUMORDER - for locking several inodes at the some time * with xfs_lock_inodes(). This flag is used as the starting subclass * and each subsequent lock acquired will increment the subclass by one. * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly * limited to the subclasses we can represent via nesting. We need at least * 5 inodes nest depth for the ILOCK through rename, and we also have to support * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all * 8 subclasses supported by lockdep. * * This also means we have to number the sub-classes in the lowest bits of * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep * mask and we can't use bit-masking to build the subclasses. What a mess. * * Bit layout: * * Bit Lock Region * 16-19 XFS_IOLOCK_SHIFT dependencies * 20-23 XFS_MMAPLOCK_SHIFT dependencies * 24-31 XFS_ILOCK_SHIFT dependencies * * IOLOCK values * * 0-3 subclass value * 4-7 unused * * MMAPLOCK values * * 0-3 subclass value * 4-7 unused * * ILOCK values * 0-4 subclass values * 5 PARENT subclass (not nestable) * 6 RTBITMAP subclass (not nestable) * 7 RTSUM subclass (not nestable) * */ #define XFS_IOLOCK_SHIFT 16 #define XFS_IOLOCK_MAX_SUBCLASS 3 #define XFS_IOLOCK_DEP_MASK 0x000f0000 #define XFS_MMAPLOCK_SHIFT 20 #define XFS_MMAPLOCK_NUMORDER 0 #define XFS_MMAPLOCK_MAX_SUBCLASS 3 #define XFS_MMAPLOCK_DEP_MASK 0x00f00000 #define XFS_ILOCK_SHIFT 24 #define XFS_ILOCK_PARENT_VAL 5 #define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1) #define XFS_ILOCK_RTBITMAP_VAL 6 #define XFS_ILOCK_RTSUM_VAL 7 #define XFS_ILOCK_DEP_MASK 0xff000000 #define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT) #define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT) #define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT) #define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \ XFS_MMAPLOCK_DEP_MASK | \ XFS_ILOCK_DEP_MASK) #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \ >> XFS_IOLOCK_SHIFT) #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \ >> XFS_MMAPLOCK_SHIFT) #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \ >> XFS_ILOCK_SHIFT) /* * For multiple groups support: if S_ISGID bit is set in the parent * directory, group of new file is set to that of the parent, and * new subdirectory gets S_ISGID bit from parent. */ #define XFS_INHERIT_GID(pip) \ (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \ (VFS_I(pip)->i_mode & S_ISGID)) int xfs_release(struct xfs_inode *ip); void xfs_inactive(struct xfs_inode *ip); int xfs_lookup(struct xfs_inode *dp, struct xfs_name *name, struct xfs_inode **ipp, struct xfs_name *ci_name); int xfs_create(struct xfs_inode *dp, struct xfs_name *name, umode_t mode, xfs_dev_t rdev, struct xfs_inode **ipp); int xfs_create_tmpfile(struct xfs_inode *dp, struct dentry *dentry, umode_t mode, struct xfs_inode **ipp); int xfs_remove(struct xfs_inode *dp, struct xfs_name *name, struct xfs_inode *ip); int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip, struct xfs_name *target_name); int xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name, struct xfs_inode *src_ip, struct xfs_inode *target_dp, struct xfs_name *target_name, struct xfs_inode *target_ip, unsigned int flags); void xfs_ilock(xfs_inode_t *, uint); int xfs_ilock_nowait(xfs_inode_t *, uint); void xfs_iunlock(xfs_inode_t *, uint); void xfs_ilock_demote(xfs_inode_t *, uint); int xfs_isilocked(xfs_inode_t *, uint); uint xfs_ilock_data_map_shared(struct xfs_inode *); uint xfs_ilock_attr_map_shared(struct xfs_inode *); uint xfs_ip2xflags(struct xfs_inode *); int xfs_ifree(struct xfs_trans *, xfs_inode_t *, struct xfs_defer_ops *); int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *, int, xfs_fsize_t); void xfs_iext_realloc(xfs_inode_t *, int, int); void xfs_iunpin_wait(xfs_inode_t *); #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) int xfs_iflush(struct xfs_inode *, struct xfs_buf **); void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint); xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip); xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip); int xfs_dir_ialloc(struct xfs_trans **, struct xfs_inode *, umode_t, xfs_nlink_t, xfs_dev_t, prid_t, int, struct xfs_inode **, int *); /* from xfs_file.c */ enum xfs_prealloc_flags { XFS_PREALLOC_SET = (1 << 1), XFS_PREALLOC_CLEAR = (1 << 2), XFS_PREALLOC_SYNC = (1 << 3), XFS_PREALLOC_INVISIBLE = (1 << 4), }; int xfs_update_prealloc_flags(struct xfs_inode *ip, enum xfs_prealloc_flags flags); int xfs_zero_eof(struct xfs_inode *ip, xfs_off_t offset, xfs_fsize_t isize, bool *did_zeroing); int xfs_zero_range(struct xfs_inode *ip, xfs_off_t pos, xfs_off_t count, bool *did_zero); loff_t __xfs_seek_hole_data(struct inode *inode, loff_t start, loff_t eof, int whence); /* from xfs_iops.c */ extern void xfs_setup_inode(struct xfs_inode *ip); extern void xfs_setup_iops(struct xfs_inode *ip); /* * When setting up a newly allocated inode, we need to call * xfs_finish_inode_setup() once the inode is fully instantiated at * the VFS level to prevent the rest of the world seeing the inode * before we've completed instantiation. Otherwise we can do it * the moment the inode lookup is complete. */
static inline void xfs_finish_inode_setup(struct xfs_inode *ip) { xfs_iflags_clear(ip, XFS_INEW); barrier(); unlock_new_inode(VFS_I(ip)); }

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dave chinnerdave chinner30100.00%1100.00%
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static inline void xfs_setup_existing_inode(struct xfs_inode *ip) { xfs_setup_inode(ip); xfs_setup_iops(ip); xfs_finish_inode_setup(ip); }

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dave chinnerdave chinner2281.48%150.00%
christoph hellwigchristoph hellwig518.52%150.00%
Total27100.00%2100.00%

#define IHOLD(ip) \ do { \ ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \ ihold(VFS_I(ip)); \ trace_xfs_ihold(ip, _THIS_IP_); \ } while (0) #define IRELE(ip) \ do { \ trace_xfs_irele(ip, _THIS_IP_); \ iput(VFS_I(ip)); \ } while (0) extern struct kmem_zone *xfs_inode_zone; /* The default CoW extent size hint. */ #define XFS_DEFAULT_COWEXTSZ_HINT 32 #endif /* __XFS_INODE_H__ */

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christoph hellwigchristoph hellwig66541.23%2837.33%
dave chinnerdave chinner38924.12%1418.67%
david chinnerdavid chinner23314.45%68.00%
arkadiusz miskiewiczarkadiusz miskiewicz754.65%11.33%
darrick j. wongdarrick j. wong563.47%68.00%
zhi yong wuzhi yong wu482.98%22.67%
brian fosterbrian foster392.42%45.33%
lachlan mcilroylachlan mcilroy311.92%11.33%
barry naujokbarry naujok301.86%11.33%
eric sandeeneric sandeen181.12%11.33%
stephen lordstephen lord90.56%34.00%
chandra seetharamanchandra seetharaman60.37%11.33%
nathan scottnathan scott50.31%34.00%
carlos maiolinocarlos maiolino40.25%11.33%
alex elderalex elder30.19%11.33%
al viroal viro10.06%11.33%
lucas de marchilucas de marchi10.06%11.33%
Total1613100.00%75100.00%
Directory: fs/xfs
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