diff options
author | Christoph Hellwig <hch@lst.de> | 2008-11-28 14:23:42 +1100 |
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committer | Niv Sardi <xaiki@sgi.com> | 2008-12-01 11:38:17 +1100 |
commit | 24f211bad09a31f19dda0c3faffe0244f4f235f5 (patch) | |
tree | 3554243712a41729df866e348a3925ffdf950b8c /fs/xfs/xfs_iget.c | |
parent | b48d8d64377f39913663a06f4757f3b8c6fc6d87 (diff) | |
download | kernel_samsung_tuna-24f211bad09a31f19dda0c3faffe0244f4f235f5.zip kernel_samsung_tuna-24f211bad09a31f19dda0c3faffe0244f4f235f5.tar.gz kernel_samsung_tuna-24f211bad09a31f19dda0c3faffe0244f4f235f5.tar.bz2 |
[XFS] move inode allocation out xfs_iread
Allocate the inode in xfs_iget_cache_miss and pass it into xfs_iread. This
simplifies the error handling and allows xfs_iread to be shared with userspace
which already uses these semantics.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_iget.c')
-rw-r--r-- | fs/xfs/xfs_iget.c | 88 |
1 files changed, 82 insertions, 6 deletions
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index d60522a..27ec241 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -40,6 +40,82 @@ #include "xfs_utils.h" #include "xfs_trans_priv.h" #include "xfs_inode_item.h" +#include "xfs_bmap.h" +#include "xfs_btree_trace.h" +#include "xfs_dir2_trace.h" + + +/* + * Allocate and initialise an xfs_inode. + */ +STATIC struct xfs_inode * +xfs_inode_alloc( + struct xfs_mount *mp, + xfs_ino_t ino) +{ + struct xfs_inode *ip; + + /* + * if this didn't occur in transactions, we could use + * KM_MAYFAIL and return NULL here on ENOMEM. Set the + * code up to do this anyway. + */ + ip = kmem_zone_alloc(xfs_inode_zone, KM_SLEEP); + if (!ip) + return NULL; + + ASSERT(atomic_read(&ip->i_iocount) == 0); + ASSERT(atomic_read(&ip->i_pincount) == 0); + ASSERT(!spin_is_locked(&ip->i_flags_lock)); + ASSERT(completion_done(&ip->i_flush)); + + /* + * initialise the VFS inode here to get failures + * out of the way early. + */ + if (!inode_init_always(mp->m_super, VFS_I(ip))) { + kmem_zone_free(xfs_inode_zone, ip); + return NULL; + } + + /* initialise the xfs inode */ + ip->i_ino = ino; + ip->i_mount = mp; + memset(&ip->i_imap, 0, sizeof(struct xfs_imap)); + ip->i_afp = NULL; + memset(&ip->i_df, 0, sizeof(xfs_ifork_t)); + ip->i_flags = 0; + ip->i_update_core = 0; + ip->i_update_size = 0; + ip->i_delayed_blks = 0; + memset(&ip->i_d, 0, sizeof(xfs_icdinode_t)); + ip->i_size = 0; + ip->i_new_size = 0; + + /* + * Initialize inode's trace buffers. + */ +#ifdef XFS_INODE_TRACE + ip->i_trace = ktrace_alloc(INODE_TRACE_SIZE, KM_NOFS); +#endif +#ifdef XFS_BMAP_TRACE + ip->i_xtrace = ktrace_alloc(XFS_BMAP_KTRACE_SIZE, KM_NOFS); +#endif +#ifdef XFS_BTREE_TRACE + ip->i_btrace = ktrace_alloc(XFS_BMBT_KTRACE_SIZE, KM_NOFS); +#endif +#ifdef XFS_RW_TRACE + ip->i_rwtrace = ktrace_alloc(XFS_RW_KTRACE_SIZE, KM_NOFS); +#endif +#ifdef XFS_ILOCK_TRACE + ip->i_lock_trace = ktrace_alloc(XFS_ILOCK_KTRACE_SIZE, KM_NOFS); +#endif +#ifdef XFS_DIR2_TRACE + ip->i_dir_trace = ktrace_alloc(XFS_DIR2_KTRACE_SIZE, KM_NOFS); +#endif + + return ip; +} /* * Check the validity of the inode we just found it the cache @@ -155,13 +231,13 @@ xfs_iget_cache_miss( unsigned long first_index, mask; xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ino); - /* - * Read the disk inode attributes into a new inode structure and get - * a new vnode for it. This should also initialize i_ino and i_mount. - */ - error = xfs_iread(mp, tp, ino, &ip, bno, flags); + ip = xfs_inode_alloc(mp, ino); + if (!ip) + return ENOMEM; + + error = xfs_iread(mp, tp, ip, bno, flags); if (error) - return error; + goto out_destroy; xfs_itrace_exit_tag(ip, "xfs_iget.alloc"); |